Complete List of Senate Polls Used
Below we have a list of all the polls used on this site. Only nonpartisan polls are used; polls taken by pollsters working for one of the parties are intentionally omitted. The date given is when the poll ended. The poll length is also given. The polls for each state are sorted in descending order of their midpoints. Incumbents are denoted by an asterisk.
The data are also available as plain text and in .csv format for use with Excel. In the latter, the first column is the day number of the midpoint (Jan. 1, 2006 = day 1.0) and the second is the poll length in days.
The site also has a page describing the Senate races, including brief descriptions of the situation, the names and photos of the candidates, and links to their campaign pages, Wikipedia entries, and state parties.
| State | Democrat | Republican | Date | Len | Dem | GOP | Ind | Pollster |
| Arizona | Jim Pederson | Jon Kyl* | Nov 08 | 1 | 44% | 53% | Election 2006 | |
| Arizona | Jim Pederson | Jon Kyl* | Nov 02 | 3 | 40% | 53% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Nov 02 | 3 | 41% | 49% | Mason-Dixon | |
| Arizona | Jim Pederson | Jon Kyl* | Nov 05 | 10 | 46% | 50% | Polimetrix | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 30 | 6 | 41% | 46% | Zimmerman | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 27 | 5 | 44% | 52% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 22 | 4 | 41% | 47% | Arizona State U. | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 15 | 1 | 42% | 51% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 16 | 3 | 43% | 48% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 16 | 6 | 33% | 49% | Northern Arizona U. | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 16 | 7 | 44% | 50% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Oct 03 | 8 | 36% | 45% | Rocky Mountain | |
| Arizona | Jim Pederson | Jon Kyl* | Sep 24 | 4 | 38% | 49% | Arizona State U. | |
| Arizona | Jim Pederson | Jon Kyl* | Sep 25 | 7 | 44% | 51% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Sep 18 | 1 | 39% | 50% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Sep 18 | 3 | 43% | 48% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Sep 05 | 8 | 44% | 50% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Aug 29 | 6 | 36% | 46% | Arizona State U. | |
| Arizona | Jim Pederson | Jon Kyl* | Aug 24 | 1 | 35% | 52% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Aug 21 | 7 | 44% | 48% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Jul 18 | 1 | 34% | 53% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Jul 16 | 3 | 40% | 52% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Jul 19 | 9 | 42% | 50% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Jul 21 | 14 | 27% | 45% | Rocky Mountain | |
| Arizona | Jim Pederson | Jon Kyl* | Jun 18 | 4 | 29% | 43% | Arizona State U. | |
| Arizona | Jim Pederson | Jon Kyl* | Jun 19 | 9 | 42% | 48% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | May 24 | 1 | 34% | 53% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | May 07 | 3 | 37% | 52% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Apr 25 | 1 | 35% | 51% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Apr 23 | 4 | 31% | 42% | Arizona State U. | |
| Arizona | Jim Pederson | Jon Kyl* | Mar 30 | 1 | 35% | 51% | Rasmussen | |
| Arizona | Jim Pederson | Jon Kyl* | Mar 27 | 9 | 42% | 47% | Zogby | |
| Arizona | Jim Pederson | Jon Kyl* | Feb 26 | 3 | 33% | 57% | SurveyUSA | |
| Arizona | Jim Pederson | Jon Kyl* | Jan 13 | 9 | 42% | 52% | Zogby | |
| California | Dianne Feinstein* | Dick Mountjoy | Nov 08 | 1 | 60% | 35% | Election 2006 | |
| California | Dianne Feinstein* | Dick Mountjoy | Nov 04 | 3 | 60% | 31% | SurveyUSA | |
| California | Dianne Feinstein* | Dick Mountjoy | Nov 05 | 10 | 61% | 29% | Polimetrix | |
| California | Dianne Feinstein* | Dick Mountjoy | Oct 30 | 8 | 55% | 33% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | Oct 25 | 3 | 59% | 33% | SurveyUSA | |
| California | Dianne Feinstein* | Dick Mountjoy | Oct 27 | 9 | 57% | 39% | Polimetrix | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 28 | 4 | 53% | 23% | Mason-Dixon | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 28 | 6 | 54% | 36% | LA Times | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 26 | 3 | 55% | 35% | SurveyUSA | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 24 | 11 | 57% | 29% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 15 | 4 | 49% | 38% | Datamar | |
| California | Dianne Feinstein* | Dick Mountjoy | Sep 07 | 1 | 58% | 35% | Rasmussen | |
| California | Dianne Feinstein* | Dick Mountjoy | Aug 27 | 3 | 56% | 34% | SurveyUSA | |
| California | Dianne Feinstein* | Dick Mountjoy | Aug 22 | 1 | 56% | 34% | Rasmussen | |
| California | Dianne Feinstein* | Dick Mountjoy | Jul 23 | 14 | 56% | 34% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | Jul 18 | 14 | 42% | 21% | Public Policy Inst. | |
| California | Dianne Feinstein* | Dick Mountjoy | Jul 10 | 4 | 56% | 34% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | Jul 05 | 1 | 60% | 33% | Rasmussen | |
| California | Dianne Feinstein* | Dick Mountjoy | May 31 | 9 | 54% | 28% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | May 25 | 6 | 59% | 30% | LA Times | |
| California | Dianne Feinstein* | Dick Mountjoy | May 15 | 1 | 55% | 38% | Rasmussen | |
| California | Dianne Feinstein* | Dick Mountjoy | Apr 10 | 8 | 59% | 31% | Field Poll | |
| California | Dianne Feinstein* | Dick Mountjoy | Feb 26 | 15 | 56% | 28% | Field Poll | |
| Conn. | Ned Lamont | Alan Schlesinger | Nov 08 | 1 | 40% | 10% | 50% | Election 2006 |
| Conn. | Ned Lamont | Alan Schlesinger | Nov 04 | 3 | 38% | 9% | 49% | SurveyUSA |
| Conn. | Ned Lamont | Alan Schlesinger | Nov 05 | 6 | 38% | 8% | 50% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Nov 05 | 10 | 44% | 5% | 48% | Polimetrix |
| Conn. | Ned Lamont | Alan Schlesinger | Nov 01 | 3 | 39% | 7% | 51% | Research 2000 |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 28 | 1 | 40% | 9% | 48% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 30 | 7 | 37% | 8% | 49% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 30 | 7 | 37% | 8% | 49% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 26 | 1 | 40% | 9% | 48% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 27 | 5 | 43% | 6% | 47% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 20 | 3 | 37% | 9% | 49% | ARG |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 19 | 3 | 35% | 6% | 52% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 16 | 7 | 43% | 4% | 49% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 10 | 3 | 40% | 4% | 53% | SurveyUSA |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 09 | 6 | 40% | 4% | 48% | U. of Conn. |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 02 | 1 | 40% | 6% | 50% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Oct 02 | 8 | 33% | 4% | 53% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 25 | 5 | 39% | 5% | 49% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 25 | 7 | 44% | 4% | 46% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 19 | 5 | 45% | 3% | 47% | ARG |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 14 | 2 | 43% | 5% | 45% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 11 | 3 | 38% | 7% | 51% | SurveyUSA |
| Conn. | Ned Lamont | Alan Schlesinger | Sep 05 | 8 | 42% | 3% | 46% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Aug 21 | 1 | 43% | 6% | 45% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Aug 21 | 5 | 42% | 3% | 44% | ARG |
| Conn. | Ned Lamont | Alan Schlesinger | Aug 21 | 7 | 39% | 2% | 49% | Zogby |
| Conn. | Ned Lamont | Alan Schlesinger | Aug 14 | 5 | 41% | 4% | 53% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Aug 10 | 2 | 41% | 6% | 46% | Rasmussen |
| Conn. | Ned Lamont | Alan Schlesinger | Jul 18 | 6 | 27% | 9% | 51% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Jun 06 | 7 | 18% | 8% | 56% | Quinnipiac U. |
| Conn. | Ned Lamont | Alan Schlesinger | Apr 30 | 6 | 18% | 10% | 56% | Quinnipiac U. |
| Delaware | Tom Carper* | Jan Ting | Nov 08 | 1 | 70% | 29% | Election 2006 | |
| Delaware | Tom Carper* | Jan Ting | Oct 24 | 7 | 60% | 26% | FDU | |
| Delaware | Tom Carper* | Jan Ting | Sep 19 | 6 | 63% | 23% | FDU | |
| Delaware | Tom Carper* | Jan Ting | 1 | 56% | 44% | 2000 Election | ||
| Florida | Bill Nelson* | Katherine Harris | Nov 08 | 1 | 60% | 38% | Election 2006 | |
| Florida | Bill Nelson* | Katherine Harris | Nov 04 | 3 | 59% | 36% | SurveyUSA | |
| Florida | Bill Nelson* | Katherine Harris | Nov 02 | 3 | 60% | 31% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Nov 01 | 2 | 58% | 34% | Mason-Dixon | |
| Florida | Bill Nelson* | Katherine Harris | Nov 05 | 10 | 60% | 34% | Polimetrix | |
| Florida | Bill Nelson* | Katherine Harris | Oct 27 | 5 | 54% | 40% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Oct 22 | 5 | 64% | 29% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Oct 17 | 2 | 57% | 31% | Mason-Dixon | |
| Florida | Bill Nelson* | Katherine Harris | Oct 16 | 7 | 54% | 37% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Oct 09 | 3 | 55% | 37% | SurveyUSA | |
| Florida | Bill Nelson* | Katherine Harris | Oct 08 | 6 | 61% | 33% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Oct 02 | 1 | 54% | 37% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Sep 28 | 3 | 58% | 31% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Sep 23 | 1 | 56% | 33% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Sep 22 | 3 | 53% | 35% | Mason-Dixon | |
| Florida | Bill Nelson* | Katherine Harris | Sep 20 | 3 | 55% | 37% | Research 2000 | |
| Florida | Bill Nelson* | Katherine Harris | Sep 13 | 3 | 53% | 38% | SurveyUSA | |
| Florida | Bill Nelson* | Katherine Harris | Sep 05 | 8 | 51% | 33% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Aug 28 | 1 | 57% | 34% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Aug 21 | 7 | 52% | 32% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Aug 09 | 4 | 60% | 30% | Eldon | |
| Florida | Bill Nelson* | Katherine Harris | Jul 25 | 1 | 61% | 33% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Jul 24 | 6 | 61% | 24% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Jul 21 | 3 | 57% | 29% | Mason-Dixon | |
| Florida | Bill Nelson* | Katherine Harris | Jul 19 | 9 | 52% | 34% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Jun 26 | 7 | 59% | 26% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Jun 22 | 1 | 54% | 32% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Jun 19 | 9 | 51% | 33% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | May 22 | 8 | 58% | 25% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | May 15 | 1 | 60% | 33% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Apr 17 | 7 | 57% | 27% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Apr 10 | 1 | 57% | 27% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Mar 27 | 9 | 59% | 38% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Mar 06 | 1 | 55% | 34% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Feb 20 | 6 | 53% | 31% | Quinnipiac U. | |
| Florida | Bill Nelson* | Katherine Harris | Feb 06 | 1 | 49% | 40% | Rasmussen | |
| Florida | Bill Nelson* | Katherine Harris | Jan 13 | 9 | 51% | 40% | Zogby | |
| Florida | Bill Nelson* | Katherine Harris | Jan 03 | 1 | 54% | 31% | Rasmussen | |
| Hawaii | Daniel Akaka* | (Primary 9/23) | Nov 08 | 1 | 63% | 35% | Election 2006 | |
| Hawaii | Daniel Akaka* | (Primary 9/23) | 1 | 73% | 25% | 2000 Election | ||
| Indiana | (unopposed) | Dick Lugar* | Nov 08 | 1 | 0 | 87% | Election 2006 | |
| Indiana | (unopposed) | Dick Lugar* | 1 | 32% | 67% | 2000 Election | ||
| Maine | Jean Bright | Olympia Snowe* | Nov 08 | 1 | 21% | 74% | Election 2006 | |
| Maine | Jean Bright | Olympia Snowe* | Oct 23 | 8 | 14% | 74% | Critical Insights | |
| Maine | Jean Bright | Olympia Snowe* | Oct 17 | 1 | 24% | 70% | Rasmussen | |
| Maine | Jean Bright | Olympia Snowe* | Aug 23 | 8 | 26% | 53% | Portland Res. | |
| Maine | Jean Bright | Olympia Snowe* | Aug 17 | 1 | 20% | 68% | Rasmussen | |
| Maine | Jean Bright | Olympia Snowe* | Jul 19 | 1 | 22% | 69% | Rasmussen | |
| Maine | Jean Bright | Olympia Snowe* | Jul 21 | 8 | 10% | 68% | Strategic Mark. | |
| Maine | Jean Bright | Olympia Snowe* | Jun 15 | 1 | 26% | 66% | Rasmussen | |
| Maine | Jean Bright | Olympia Snowe* | Feb 27 | 1 | 21% | 63% | Rasmussen | |
| Maine | Jean Bright | Olympia Snowe* | Jan 25 | 1 | 20% | 52% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Nov 08 | 1 | 54% | 44% | Election 2006 | |
| Maryland | Ben Cardin | Michael Steele | Nov 06 | 4 | 49% | 46% | SurveyUSA | |
| Maryland | Ben Cardin | Michael Steele | Nov 03 | 3 | 47% | 44% | Mason-Dixon | |
| Maryland | Ben Cardin | Michael Steele | Nov 03 | 4 | 47% | 47% | SurveyUSA | |
| Maryland | Ben Cardin | Michael Steele | Nov 01 | 1 | 50% | 45% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Nov 05 | 10 | 51% | 45% | Polimetrix | |
| Maryland | Ben Cardin | Michael Steele | Oct 30 | 3 | 49% | 43% | Potomac Inc. | |
| Maryland | Ben Cardin | Michael Steele | Oct 30 | 7 | 49% | 44% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Oct 26 | 1 | 49% | 42% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Oct 27 | 5 | 53% | 44% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Oct 26 | 5 | 54% | 43% | Washington Post | |
| Maryland | Ben Cardin | Michael Steele | Oct 17 | 3 | 46% | 46% | SurveyUSA | |
| Maryland | Ben Cardin | Michael Steele | Oct 16 | 7 | 51% | 43% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Oct 12 | 1 | 50% | 43% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Oct 01 | 5 | 54% | 39% | Gallup | |
| Maryland | Ben Cardin | Michael Steele | Oct 02 | 8 | 45% | 37% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Sep 26 | 5 | 47% | 41% | Mason-Dixon | |
| Maryland | Ben Cardin | Michael Steele | Sep 25 | 7 | 52% | 39% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Sep 19 | 3 | 47% | 48% | SurveyUSA | |
| Maryland | Ben Cardin | Michael Steele | Sep 18 | 4 | 51% | 40% | Potomac Inc. | |
| Maryland | Ben Cardin | Michael Steele | Sep 13 | 1 | 50% | 43% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Sep 05 | 8 | 49% | 40% | Zogby | |
| Maryland | Ben Cardin | Michael Steele | Aug 31 | 7 | 44% | 39% | Gonzales | |
| Maryland | Ben Cardin | Michael Steele | Aug 09 | 1 | 47% | 42% | Rasmussen | |
| Maryland | Ben Cardin | Michael Steele | Jul 10 | 1 | 47% | 41% | Rasmussen | |
| Mass. | Ted Kennedy* | Ken Chase | Nov 08 | 1 | 69% | 31% | Election 2006 | |
| Mass. | Ted Kennedy* | Ken Chase | Nov 05 | 10 | 67% | 27% | Polimetrix | |
| Mass. | Ted Kennedy* | Ken Chase | Oct 27 | 5 | 62% | 32% | Zogby | |
| Mass. | Ted Kennedy* | Ken Chase | Oct 24 | 1 | 60% | 26% | Suffolk U. | |
| Mass. | Ted Kennedy* | Ken Chase | Oct 25 | 4 | 60% | 25% | Granite State Poll | |
| Mass. | Ted Kennedy* | Ken Chase | Oct 16 | 7 | 60% | 35% | Zogby | |
| Mass. | Ted Kennedy* | Ken Chase | 1 | 73% | 13% | 2000 Election | ||
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 08 | 1 | 57% | 41% | Election 2006 | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 04 | 3 | 52% | 42% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 02 | 3 | 53% | 34% | Selzer | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 02 | 3 | 53% | 37% | Mason-Dixon | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 05 | 10 | 55% | 40% | Polimetrix | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Nov 01 | 3 | 51% | 38% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 30 | 5 | 52% | 38% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 27 | 5 | 49% | 42% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 24 | 2 | 52% | 41% | Research 2000 | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 25 | 4 | 50% | 38% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 24 | 3 | 51% | 44% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 22 | 1 | 55% | 39% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 16 | 7 | 48% | 44% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 09 | 4 | 53% | 42% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 04 | 1 | 56% | 39% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Oct 04 | 2 | 48% | 35% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Sep 25 | 7 | 49% | 42% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Sep 17 | 3 | 54% | 41% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Sep 12 | 6 | 54% | 34% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Sep 05 | 8 | 50% | 44% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 31 | 1 | 51% | 43% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 30 | 3 | 50% | 37% | Selzer | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 22 | 2 | 51% | 38% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 21 | 3 | 51% | 42% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 21 | 7 | 49% | 45% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 14 | 6 | 54% | 42% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 10 | 1 | 49% | 44% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Aug 07 | 3 | 48% | 41% | SurveyUSA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jul 19 | 9 | 48% | 42% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jul 12 | 6 | 50% | 29% | Selzer | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jun 19 | 9 | 49% | 41% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jun 09 | 5 | 48% | 34% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | May 08 | 4 | 54% | 36% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | May 08 | 8 | 55% | 28% | EPIC-MRA | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Apr 26 | 1 | 54% | 34% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Mar 27 | 9 | 52% | 38% | Zogby | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Feb 09 | 1 | 54% | 33% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jan 15 | 1 | 56% | 31% | Rasmussen | |
| Michigan | Debbie Stabenow* | Mike Bouchard | Jan 13 | 9 | 51% | 39% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Nov 08 | 1 | 58% | 38% | Election 2006 | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Nov 05 | 3 | 56% | 40% | SurveyUSA | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Nov 03 | 4 | 54% | 34% | Star Tribune | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Nov 01 | 1 | 54% | 40% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Nov 05 | 10 | 57% | 39% | Polimetrix | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 28 | 6 | 55% | 33% | U. of Minnesota | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 25 | 1 | 53% | 39% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 27 | 5 | 50% | 40% | Mason-Dixon | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 27 | 5 | 51% | 43% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 23 | 3 | 55% | 39% | SurveyUSA | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 27 | 13 | 56% | 31% | St. Cloud U. | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 16 | 7 | 50% | 43% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 11 | 6 | 55% | 34% | Star Tribune | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Oct 04 | 1 | 56% | 40% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 27 | 3 | 51% | 43% | SurveyUSA | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 25 | 7 | 49% | 40% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 20 | 3 | 52% | 37% | Mason-Dixon | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 18 | 6 | 52% | 36% | U. of Minnesota | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 15 | 3 | 56% | 32% | Star Tribune | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Sep 05 | 8 | 49% | 40% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Aug 28 | 1 | 47% | 40% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Aug 27 | 1 | 50% | 40% | Gallup | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Aug 27 | 7 | 43% | 39% | FDU | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Aug 21 | 7 | 50% | 42% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Aug 01 | 1 | 50% | 38% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jul 23 | 3 | 47% | 42% | SurveyUSA | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jul 19 | 9 | 49% | 43% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jul 11 | 6 | 50% | 31% | Star Tribune | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jun 26 | 1 | 47% | 44% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jun 19 | 9 | 49% | 41% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Apr 27 | 1 | 45% | 43% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Mar 27 | 9 | 49% | 41% | Zogby | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Feb 14 | 1 | 45% | 42% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jan 16 | 1 | 43% | 42% | Rasmussen | |
| Minnesota | Amy Klobuchar | Mark Kennedy | Jan 13 | 9 | 49% | 43% | Zogby | |
| Mississippi | Erik Fleming | Trent Lott* | Nov 08 | 1 | 35% | 64% | Election 2006 | |
| Mississippi | Erik Fleming | Trent Lott* | Feb 13 | 1 | 29% | 66% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 08 | 1 | 50% | 47% | Election 2006 | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 05 | 1 | 48% | 49% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 06 | 3 | 50% | 44% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 05 | 3 | 51% | 42% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 04 | 4 | 49% | 45% | Gallup | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 02 | 1 | 49% | 48% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 03 | 3 | 46% | 45% | Mason-Dixon | |
| Missouri | Claire McCaskill | Jim Talent* | Nov 05 | 10 | 50% | 50% | Polimetrix | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 30 | 1 | 48% | 47% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 30 | 3 | 49% | 46% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 29 | 4 | 49% | 49% | Opinion Research | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 30 | 7 | 46% | 43% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 25 | 1 | 46% | 48% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 27 | 5 | 47% | 49% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 26 | 4 | 47% | 47% | Research 2000 | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 24 | 4 | 45% | 48% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 23 | 3 | 45% | 48% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 23 | 4 | 45% | 48% | LA Times | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 19 | 3 | 46% | 43% | Mason-Dixon | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 16 | 7 | 47% | 50% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 12 | 1 | 43% | 42% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 11 | 3 | 51% | 42% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 02 | 1 | 47% | 46% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 01 | 5 | 48% | 45% | Gallup | |
| Missouri | Claire McCaskill | Jim Talent* | Oct 02 | 8 | 39% | 43% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Sep 27 | 4 | 43% | 43% | Mason-Dixon | |
| Missouri | Claire McCaskill | Jim Talent* | Sep 25 | 7 | 45% | 47% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Sep 12 | 1 | 45% | 42% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Sep 13 | 3 | 48% | 47% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Sep 05 | 8 | 45% | 49% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Aug 31 | 4 | 47% | 46% | Research 2000 | |
| Missouri | Claire McCaskill | Jim Talent* | Aug 27 | 5 | 44% | 50% | Gallup | |
| Missouri | Claire McCaskill | Jim Talent* | Aug 21 | 7 | 45% | 50% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Aug 15 | 1 | 44% | 46% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Aug 14 | 3 | 47% | 46% | SurveyUSA | |
| Missouri | Claire McCaskill | Jim Talent* | Jul 20 | 1 | 45% | 42% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Jul 19 | 9 | 45% | 49% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Jun 27 | 1 | 42% | 42% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Jun 22 | 4 | 49% | 43% | Research 2000 | |
| Missouri | Claire McCaskill | Jim Talent* | Jun 19 | 9 | 44% | 49% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | May 08 | 1 | 40% | 43% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Apr 04 | 1 | 42% | 41% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Mar 27 | 9 | 45% | 48% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Mar 06 | 1 | 43% | 40% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Feb 08 | 1 | 46% | 41% | Rasmussen | |
| Missouri | Claire McCaskill | Jim Talent* | Jan 18 | 3 | 47% | 44% | Research 2000 | |
| Missouri | Claire McCaskill | Jim Talent* | Jan 05 | 1 | 45% | 49% | Zogby | |
| Missouri | Claire McCaskill | Jim Talent* | Jan 02 | 1 | 46% | 43% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Nov 08 | 1 | 49% | 48% | Election 2006 | |
| Montana | Jon Tester | Conrad Burns* | Nov 04 | 1 | 50% | 48% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Nov 04 | 4 | 50% | 41% | Gallup | |
| Montana | Jon Tester | Conrad Burns* | Nov 03 | 3 | 50% | 41% | Gallup | |
| Montana | Jon Tester | Conrad Burns* | Nov 01 | 1 | 50% | 46% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Nov 02 | 3 | 47% | 47% | Mason-Dixon | |
| Montana | Jon Tester | Conrad Burns* | Oct 30 | 7 | 47% | 46% | Zogby | |
| Montana | Jon Tester | Conrad Burns* | Oct 26 | 1 | 51% | 47% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Oct 18 | 1 | 48% | 46% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Oct 19 | 3 | 46% | 43% | Mason-Dixon | |
| Montana | Jon Tester | Conrad Burns* | Oct 15 | 6 | 46% | 35% | Montana State U. | |
| Montana | Jon Tester | Conrad Burns* | Oct 11 | 1 | 49% | 42% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Oct 10 | 1 | 50% | 46% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Oct 02 | 8 | 46% | 42% | Zogby | |
| Montana | Jon Tester | Conrad Burns* | Sep 28 | 4 | 47% | 40% | Mason-Dixon | |
| Montana | Jon Tester | Conrad Burns* | Sep 20 | 1 | 50% | 43% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Sep 13 | 1 | 52% | 43% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Aug 27 | 5 | 48% | 45% | Gallup | |
| Montana | Jon Tester | Conrad Burns* | Aug 08 | 1 | 47% | 47% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Jul 06 | 1 | 50% | 43% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | May 24 | 3 | 45% | 42% | Mason-Dixon | |
| Montana | Jon Tester | Conrad Burns* | May 11 | 1 | 48% | 44% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Apr 11 | 1 | 44% | 47% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Mar 14 | 1 | 46% | 43% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Feb 07 | 1 | 46% | 46% | Rasmussen | |
| Montana | Jon Tester | Conrad Burns* | Jan 09 | 1 | 45% | 45% | Rasmussen | |
| Nebraska | Ben Nelson* | Pete Ricketts | Nov 08 | 1 | 64% | 36% | Election 2006 | |
| Nebraska | Ben Nelson* | Pete Ricketts | Oct 16 | 1 | 54% | 34% | Rasmussen | |
| Nebraska | Ben Nelson* | Pete Ricketts | Sep 20 | 1 | 55% | 32% | Rasmussen | |
| Nebraska | Ben Nelson* | Pete Ricketts | Sep 19 | 1 | 55% | 32% | Rasmussen | |
| Nebraska | Ben Nelson* | Pete Ricketts | Aug 10 | 1 | 55% | 32% | Rasmussen | |
| Nebraska | Ben Nelson* | Pete Ricketts | Jul 11 | 1 | 57% | 31% | Rasmussen | |
| Nebraska | Ben Nelson* | Pete Ricketts | May 10 | 1 | 54% | 35% | Rasmussen | |
| Nebraska | Ben Nelson* | Pete Ricketts | Apr 19 | 1 | 54% | 36% | Rasmussen | |
| Nevada | Jack Carter | John Ensign* | Nov 08 | 1 | 41% | 55% | Election 2006 | |
| Nevada | Jack Carter | John Ensign* | Nov 05 | 10 | 42% | 53% | Polimetrix | |
| Nevada | Jack Carter | John Ensign* | Oct 30 | 1 | 42% | 54% | Rasmussen | |
| Nevada | Jack Carter | John Ensign* | Oct 30 | 5 | 37% | 54% | Mason-Dixon | |
| Nevada | Jack Carter | John Ensign* | Oct 27 | 5 | 37% | 58% | Zogby | |
| Nevada | Jack Carter | John Ensign* | Oct 25 | 3 | 41% | 55% | Research 2000 | |
| Nevada | Jack Carter | John Ensign* | Oct 17 | 1 | 42% | 50% | Rasmussen | |
| Nevada | Jack Carter | John Ensign* | Oct 16 | 7 | 43% | 52% | Zogby | |
| Nevada | Jack Carter | John Ensign* | Sep 21 | 3 | 35% | 58% | Mason-Dixon | |
| Nevada | Jack Carter | John Ensign* | Sep 06 | 1 | 41% | 50% | Rasmussen | |
| Nevada | Jack Carter | John Ensign* | Sep 07 | 3 | 35% | 56% | Research 2000 | |
| Nevada | Jack Carter | John Ensign* | Sep 05 | 8 | 40% | 52% | Zogby | |
| Nevada | Jack Carter | John Ensign* | Aug 21 | 7 | 45% | 48% | Zogby | |
| Nevada | Jack Carter | John Ensign* | Aug 08 | 2 | 33% | 54% | Mason-Dixon | |
| Nevada | Jack Carter | John Ensign* | Jul 31 | 1 | 39% | 46% | Rasmussen | |
| Nevada | Jack Carter | John Ensign* | Jul 19 | 9 | 33% | 50% | Zogby | |
| Nevada | Jack Carter | John Ensign* | Jun 19 | 9 | 36% | 51% | Zogby | |
| Nevada | Jack Carter | John Ensign* | May 09 | 1 | 35% | 52% | Rasmussen | |
| Nevada | Jack Carter | John Ensign* | Apr 05 | 3 | 27% | 60% | Mason-Dixon | |
| Nevada | Jack Carter | John Ensign* | Mar 27 | 9 | 38% | 52% | Zogby | |
| Nevada | Jack Carter | John Ensign* | Jan 05 | 1 | 34% | 51% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Nov 08 | 1 | 53% | 45% | Election 2006 | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Nov 04 | 4 | 50% | 40% | Gallup | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Nov 03 | 3 | 45% | 42% | Monmouth U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Nov 03 | 3 | 48% | 41% | Mason-Dixon | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Nov 03 | 3 | 50% | 40% | Gallup | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Nov 03 | 3 | 50% | 42% | Marist Coll. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Nov 05 | 7 | 48% | 43% | Quinnipiac U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Nov 01 | 1 | 48% | 43% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Nov 05 | 10 | 53% | 47% | Polimetrix | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 31 | 3 | 46% | 42% | Rutgers-Eagleton | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 29 | 1 | 49% | 44% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 28 | 1 | 49% | 44% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 31 | 7 | 45% | 36% | FDU | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 29 | 4 | 51% | 44% | Opinion Research | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 30 | 7 | 49% | 37% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 29 | 7 | 49% | 44% | Quinnipiac U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 25 | 1 | 41% | 43% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 27 | 5 | 49% | 43% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 25 | 3 | 48% | 42% | Research 2000 | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 25 | 6 | 40% | 39% | CBS NY Times | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 23 | 4 | 45% | 41% | LA Times | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 21 | 4 | 45% | 42% | Mason-Dixon | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 19 | 4 | 48% | 39% | Monmouth U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 16 | 7 | 45% | 47% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 11 | 1 | 42% | 39% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 10 | 7 | 49% | 45% | Quinnipiac U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Sep 30 | 1 | 37% | 42% | Marist Coll. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 02 | 6 | 46% | 39% | FDU | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 01 | 5 | 46% | 43% | Gallup | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Oct 02 | 8 | 46% | 35% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Sep 27 | 4 | 44% | 41% | Mason-Dixon | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Sep 26 | 3 | 45% | 44% | Rutgers-Eagleton | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Sep 22 | 1 | 40% | 41% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Sep 25 | 7 | 47% | 41% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Sep 21 | 4 | 38% | 44% | Monmouth U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Sep 18 | 6 | 45% | 48% | Quinnipiac U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Sep 05 | 8 | 40% | 40% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Aug 28 | 1 | 39% | 44% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Aug 27 | 7 | 39% | 43% | FDU | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Aug 21 | 7 | 43% | 41% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jul 25 | 1 | 44% | 38% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jul 19 | 9 | 45% | 39% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jul 16 | 7 | 43% | 40% | FDU | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jul 13 | 3 | 38% | 37% | Monmouth U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jul 12 | 5 | 38% | 40% | Quinnipiac U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jun 21 | 1 | 46% | 40% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jun 19 | 6 | 42% | 38% | Rutgers-Eagleton | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jun 19 | 9 | 41% | 40% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jun 13 | 7 | 43% | 36% | Quinnipiac U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | May 16 | 1 | 37% | 40% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Apr 24 | 7 | 40% | 34% | Quinnipiac U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Apr 11 | 1 | 36% | 43% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Apr 02 | 7 | 38% | 42% | FDU | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Mar 28 | 1 | 39% | 41% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Mar 30 | 5 | 40% | 35% | Rutgers-Eagleton | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Mar 27 | 9 | 40% | 40% | Zogby | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Mar 14 | 7 | 40% | 36% | Quinnipiac U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Mar 06 | 8 | 42% | 37% | FDU | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Feb 14 | 1 | 39% | 36% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jan 23 | 6 | 38% | 36% | Quinnipiac U. | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jan 18 | 1 | 35% | 42% | Rasmussen | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jan 10 | 8 | 25% | 36% | FDU | |
| New Jersey | Bob Menendez* | Tom Kean, Jr. | Jan 05 | 1 | 38% | 43% | Zogby | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Nov 08 | 1 | 70% | 30% | Election 2006 | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Oct 27 | 5 | 58% | 38% | Zogby | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Oct 16 | 7 | 62% | 34% | Zogby | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Sep 28 | 4 | 65% | 19% | Res. and Polling | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Sep 07 | 1 | 56% | 32% | Rasmussen | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Sep 05 | 8 | 59% | 33% | Zogby | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Aug 31 | 7 | 62% | 23% | Res. and Polling | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Jul 19 | 9 | 54% | 32% | Zogby | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Jun 27 | 1 | 54% | 31% | Rasmussen | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Jun 19 | 9 | 55% | 36% | Zogby | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Mar 27 | 9 | 53% | 30% | Zogby | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Jan 24 | 1 | 59% | 33% | Rasmussen | |
| New Mexico | Jeff Bingaman* | Allen McCullogh | Jan 05 | 1 | 57% | 26% | Zogby | |
| New York | Hillary Clinton* | John Spencer | Nov 08 | 1 | 67% | 31% | Election 2006 | |
| New York | Hillary Clinton* | John Spencer | Nov 01 | 1 | 60% | 30% | Rasmussen | |
| New York | Hillary Clinton* | John Spencer | Nov 01 | 3 | 65% | 28% | Siena Coll. | |
| New York | Hillary Clinton* | John Spencer | Nov 01 | 3 | 65% | 32% | Marist Coll. | |
| New York | Hillary Clinton* | John Spencer | Nov 01 | 3 | 66% | 32% | Marist | |
| New York | Hillary Clinton* | John Spencer | Oct 27 | 5 | 57% | 33% | Zogby | |
| New York | Hillary Clinton* | John Spencer | Oct 18 | 3 | 67% | 30% | Marist Coll. | |
| New York | Hillary Clinton* | John Spencer | Oct 16 | 6 | 65% | 30% | Quinnipiac U. | |
| New York | Hillary Clinton* | John Spencer | Oct 16 | 7 | 56% | 32% | Zogby | |
| New York | Hillary Clinton* | John Spencer | Oct 12 | 4 | 59% | 32% | Siena Coll. | |
| New York | Hillary Clinton* | John Spencer | Oct 09 | 5 | 53% | 28% | Zogby | |
| New York | Hillary Clinton* | John Spencer | Oct 01 | 6 | 66% | 31% | Quinnipiac U. | |
| New York | Hillary Clinton* | John Spencer | Sep 27 | 4 | 59% | 27% | NY Times | |
| New York | Hillary Clinton* | John Spencer | Sep 14 | 2 | 62% | 33% | Sienna College | |
| New York | Hillary Clinton* | John Spencer | Sep 07 | 3 | 62% | 32% | Marist Coll. | |
| New York | Hillary Clinton* | John Spencer | Sep 05 | 8 | 57% | 33% | Zogby | |
| New York | Hillary Clinton* | John Spencer | Aug 18 | 12 | 60% | 35% | Marist Coll. | |
| New York | Hillary Clinton* | John Spencer | Aug 03 | 4 | 58% | 32% | Siena Coll. | |
| New York | Hillary Clinton* | John Spencer | Jul 31 | 1 | 61% | 31% | Rasmussen | |
| New York | Hillary Clinton* | John Spencer | Jul 19 | 9 | 54% | 34% | Zogby | |
| New York | Hillary Clinton* | John Spencer | Jul 14 | 4 | 61% | 34% | Marist Coll. | |
| New York | Hillary Clinton* | John Spencer | Jun 19 | 8 | 57% | 33% | Quinnipiac U. | |
| New York | Hillary Clinton* | John Spencer | Jun 19 | 9 | 51% | 33% | Zogby | |
| New York | Hillary Clinton* | John Spencer | Jun 14 | 3 | 58% | 32% | Siena Coll. | |
| New York | Hillary Clinton* | John Spencer | Jun 05 | 5 | 59% | 28% | Newsday | |
| New York | Hillary Clinton* | John Spencer | May 07 | 7 | 63% | 33% | Marist Coll. | |
| New York | Hillary Clinton* | John Spencer | May 02 | 9 | 58% | 33% | Siena Coll. | |
| New York | Hillary Clinton* | John Spencer | Mar 27 | 7 | 60% | 30% | Quinnipiac U. | |
| New York | Hillary Clinton* | John Spencer | Mar 27 | 9 | 54% | 33% | Zogby | |
| New York | Hillary Clinton* | John Spencer | Mar 07 | 7 | 57% | 32% | Siena Coll. | |
| New York | Hillary Clinton* | John Spencer | Jan 26 | 3 | 62% | 33% | Marist Coll. | |
| New York | Hillary Clinton* | John Spencer | Jan 27 | 5 | 58% | 31% | Siena Coll. | |
| New York | Hillary Clinton* | John Spencer | Jan 16 | 7 | 60% | 30% | Quinnipiac U. | |
| New York | Hillary Clinton* | John Spencer | Jan 05 | 1 | 61% | 30% | Zogby | |
| North Dakota | Kent Conrad* | Dwight Grotberg | Nov 08 | 1 | 69% | 29% | Election 2006 | |
| North Dakota | Kent Conrad* | Dwight Grotberg | Jan 25 | 1 | 57% | 35% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Nov 08 | 1 | 56% | 44% | Election 2006 | |
| Ohio | Sherrod Brown | Mike DeWine* | Nov 05 | 3 | 54% | 42% | SurveyUSA | |
| Ohio | Sherrod Brown | Mike DeWine* | Nov 05 | 5 | 56% | 44% | U. of Cincinnati | |
| Ohio | Sherrod Brown | Mike DeWine* | Nov 02 | 3 | 50% | 44% | Mason-Dixon | |
| Ohio | Sherrod Brown | Mike DeWine* | Nov 05 | 10 | 58% | 40% | Polimetrix | |
| Ohio | Sherrod Brown | Mike DeWine* | Nov 03 | 10 | 62% | 38% | Columbus Disp. | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 29 | 4 | 54% | 43% | Opinion Research | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 30 | 7 | 49% | 42% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 27 | 5 | 49% | 47% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 29 | 10 | 51% | 44% | Opinion Consult. | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 24 | 1 | 53% | 41% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 25 | 3 | 57% | 37% | SurveyUSA | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 23 | 4 | 47% | 39% | LA Times | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 20 | 3 | 48% | 40% | Mason-Dixon | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 15 | 5 | 48% | 34% | New York Times | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 16 | 7 | 49% | 45% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 15 | 6 | 53% | 41% | Quinnipiac U. | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 12 | 1 | 46% | 41% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 14 | 6 | 52% | 45% | U. of Cincinnati | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 11 | 3 | 54% | 40% | SurveyUSA | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 03 | 1 | 49% | 41% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Oct 02 | 8 | 41% | 41% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Sep 28 | 4 | 45% | 43% | Mason-Dixon | |
| Ohio | Sherrod Brown | Mike DeWine* | Sep 25 | 7 | 45% | 41% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Sep 20 | 3 | 52% | 42% | SurveyUSA | |
| Ohio | Sherrod Brown | Mike DeWine* | Sep 22 | 14 | 47% | 42% | Columbus Disp. | |
| Ohio | Sherrod Brown | Mike DeWine* | Sep 17 | 7 | 45% | 44% | Quinnipiac U. | |
| Ohio | Sherrod Brown | Mike DeWine* | Sep 13 | 1 | 47% | 41% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Sep 17 | 11 | 51% | 47% | U. of Cincinnati | |
| Ohio | Sherrod Brown | Mike DeWine* | Sep 29 | 41 | 42% | 42% | Opinion Research | |
| Ohio | Sherrod Brown | Mike DeWine* | Sep 29 | 41 | 42% | 42% | U. of Akron | |
| Ohio | Sherrod Brown | Mike DeWine* | Sep 05 | 8 | 45% | 41% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Aug 27 | 5 | 39% | 37% | Gallup | |
| Ohio | Sherrod Brown | Mike DeWine* | Aug 22 | 1 | 45% | 42% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Aug 21 | 7 | 47% | 39% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Aug 08 | 4 | 49% | 41% | SurveyUSA | |
| Ohio | Sherrod Brown | Mike DeWine* | Jul 26 | 1 | 44% | 42% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Jul 20 | 10 | 45% | 37% | Columbus Disp. | |
| Ohio | Sherrod Brown | Mike DeWine* | Jul 19 | 9 | 45% | 37% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Jun 20 | 1 | 46% | 39% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Jun 19 | 9 | 47% | 34% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Jun 12 | 3 | 48% | 39% | SurveyUSA | |
| Ohio | Sherrod Brown | Mike DeWine* | May 21 | 13 | 42% | 52% | U. of Cincinatti | |
| Ohio | Sherrod Brown | Mike DeWine* | May 08 | 1 | 44% | 41% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Apr 26 | 3 | 36% | 47% | Mason-Dixon | |
| Ohio | Sherrod Brown | Mike DeWine* | Apr 19 | 1 | 41% | 43% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Mar 28 | 1 | 42% | 45% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Mar 27 | 9 | 46% | 37% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Feb 16 | 1 | 37% | 46% | Rasmussen | |
| Ohio | Sherrod Brown | Mike DeWine* | Jan 22 | 14 | 43% | 38% | Opinion Consult. | |
| Ohio | Sherrod Brown | Mike DeWine* | Jan 05 | 1 | 41% | 37% | Zogby | |
| Ohio | Sherrod Brown | Mike DeWine* | Jan 03 | 1 | 40% | 45% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Nov 08 | 1 | 59% | 41% | Election 2006 | |
| Pennsylvania | Bob Casey | Rick Santorum* | Nov 02 | 3 | 52% | 39% | Mason-Dixon | |
| Pennsylvania | Bob Casey | Rick Santorum* | Nov 05 | 10 | 56% | 40% | Polimetrix | |
| Pennsylvania | Bob Casey | Rick Santorum* | Nov 01 | 4 | 51% | 43% | Muhlenberg Coll. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 28 | 1 | 55% | 42% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 29 | 5 | 53% | 38% | Keystone Poll | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 30 | 7 | 48% | 40% | Zogby | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 26 | 1 | 55% | 42% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 29 | 7 | 52% | 42% | Quinnipiac U. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 27 | 5 | 53% | 44% | Zogby | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 25 | 4 | 50% | 39% | West Chester U. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 25 | 10 | 54% | 38% | Temple U. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 21 | 4 | 51% | 39% | Mason-Dixon | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 16 | 1 | 54% | 41% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 16 | 7 | 52% | 44% | Zogby | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 08 | 6 | 46% | 41% | Muhlenberg Coll. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 05 | 1 | 50% | 37% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Oct 02 | 8 | 48% | 36% | Zogby | |
| Pennsylvania | Bob Casey | Rick Santorum* | Sep 26 | 5 | 49% | 40% | Mason-Dixon | |
| Pennsylvania | Bob Casey | Rick Santorum* | Sep 25 | 7 | 46% | 40% | Zogby | |
| Pennsylvania | Bob Casey | Rick Santorum* | Sep 24 | 6 | 51% | 39% | Quinnipiac U. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Sep 20 | 1 | 46% | 41% | Keystone Poll | |
| Pennsylvania | Bob Casey | Rick Santorum* | Sep 20 | 1 | 49% | 39% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Sep 18 | 6 | 45% | 38% | Keystone Poll | |
| Pennsylvania | Bob Casey | Rick Santorum* | Sep 18 | 8 | 52% | 31% | Princeton Survey | |
| Pennsylvania | Bob Casey | Rick Santorum* | Sep 05 | 8 | 47% | 43% | Zogby | |
| Pennsylvania | Bob Casey | Rick Santorum* | Aug 27 | 5 | 56% | 38% | Gallup | |
| Pennsylvania | Bob Casey | Rick Santorum* | Aug 22 | 1 | 48% | 40% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Aug 21 | 4 | 44% | 39% | Keystone Poll | |
| Pennsylvania | Bob Casey | Rick Santorum* | Aug 21 | 7 | 51% | 42% | Zogby | |
| Pennsylvania | Bob Casey | Rick Santorum* | Aug 13 | 6 | 48% | 42% | Quinnipiac U. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Aug 03 | 4 | 45% | 39% | Muhlenberg Coll. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Jul 26 | 1 | 50% | 39% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Jul 19 | 9 | 49% | 40% | Zogby | |
| Pennsylvania | Bob Casey | Rick Santorum* | Jun 19 | 1 | 52% | 37% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Jun 19 | 7 | 52% | 34% | Quinnipiac U. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Jun 19 | 9 | 48% | 41% | Zogby | |
| Pennsylvania | Bob Casey | Rick Santorum* | May 22 | 1 | 56% | 33% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | May 08 | 7 | 49% | 36% | Quinnipiac U. | |
| Pennsylvania | Bob Casey | Rick Santorum* | May 01 | 5 | 47% | 41% | Keystone Poll | |
| Pennsylvania | Bob Casey | Rick Santorum* | Apr 25 | 9 | 46% | 38% | Muhlenberg Coll. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Apr 03 | 7 | 48% | 37% | Quinnipiac U. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Mar 29 | 1 | 50% | 41% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Mar 27 | 9 | 47% | 39% | Zogby | |
| Pennsylvania | Bob Casey | Rick Santorum* | Mar 02 | 6 | 49% | 37% | Muhlenberg Coll. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Feb 16 | 1 | 52% | 36% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Feb 06 | 7 | 51% | 36% | Quinnipiac U. | |
| Pennsylvania | Bob Casey | Rick Santorum* | Feb 05 | 6 | 50% | 39% | Keystone Poll | |
| Pennsylvania | Bob Casey | Rick Santorum* | Jan 15 | 1 | 53% | 38% | Rasmussen | |
| Pennsylvania | Bob Casey | Rick Santorum* | Jan 05 | 1 | 51% | 41% | Zogby | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Nov 08 | 1 | 53% | 47% | Election 2006 | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Nov 04 | 4 | 48% | 45% | Gallup | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Nov 03 | 3 | 48% | 45% | Gallup | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Nov 02 | 3 | 45% | 46% | Mason-Dixon | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Oct 30 | 7 | 53% | 39% | Zogby | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Oct 25 | 3 | 43% | 33% | Rhode Island Coll. | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Oct 23 | 1 | 52% | 44% | Rasmussen | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Oct 20 | 3 | 48% | 43% | Mason-Dixon | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Oct 14 | 4 | 46% | 42% | Fleming and Assocs. | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Oct 06 | 1 | 51% | 42% | Rasmussen | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Oct 04 | 3 | 40% | 37% | Rhode Island Coll. | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Oct 01 | 5 | 50% | 39% | Gallup | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Oct 02 | 8 | 45% | 41% | Zogby | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Sep 28 | 4 | 42% | 41% | Mason-Dixon | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Sep 18 | 3 | 40% | 39% | Brown U. | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Sep 19 | 5 | 45% | 40% | ARG | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Sep 13 | 1 | 51% | 43% | Rasmussen | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Aug 23 | 1 | 44% | 42% | Rasmussen | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Aug 03 | 1 | 44% | 38% | Rasmussen | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Jul 11 | 1 | 46% | 41% | Rasmussen | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Jun 26 | 3 | 38% | 37% | Brown U. | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Jun 14 | 3 | 40% | 43% | Rhode Island Coll. | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Jun 05 | 1 | 42% | 44% | Rasmussen | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Apr 28 | 4 | 31% | 41% | Fleming and Assocs. | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Apr 26 | 1 | 41% | 44% | Rasmussen | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Apr 20 | 4 | 32% | 51% | Rhode Island Coll. | |
| Rhode Island | Sheldon Whitehouse | Lincoln Chafee* | Feb 06 | 3 | 34% | 40% | Brown U. | |
| Tennessee | Harold Ford | Bob Corker | Nov 08 | 1 | 48% | 51% | Election 2006 | |
| Tennessee | Harold Ford | Bob Corker | Nov 04 | 1 | 47% | 51% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Nov 05 | 3 | 46% | 51% | SurveyUSA | |
| Tennessee | Harold Ford | Bob Corker | Nov 04 | 4 | 46% | 49% | Gallup | |
| Tennessee | Harold Ford | Bob Corker | Nov 02 | 1 | 45% | 53% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Nov 03 | 3 | 38% | 50% | Mason-Dixon | |
| Tennessee | Harold Ford | Bob Corker | Nov 05 | 10 | 46% | 51% | Polimetrix | |
| Tennessee | Harold Ford | Bob Corker | Oct 30 | 1 | 47% | 49% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Oct 29 | 4 | 44% | 52% | Opinion Research | |
| Tennessee | Harold Ford | Bob Corker | Oct 30 | 7 | 43% | 53% | Zogby | |
| Tennessee | Harold Ford | Bob Corker | Oct 27 | 5 | 48% | 49% | Zogby | |
| Tennessee | Harold Ford | Bob Corker | Oct 24 | 3 | 48% | 48% | SurveyUSA | |
| Tennessee | Harold Ford | Bob Corker | Oct 22 | 1 | 46% | 47% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Oct 23 | 4 | 44% | 49% | LA Times | |
| Tennessee | Harold Ford | Bob Corker | Oct 20 | 2 | 43% | 45% | Mason-Dixon | |
| Tennessee | Harold Ford | Bob Corker | Oct 16 | 7 | 42% | 49% | Zogby | |
| Tennessee | Harold Ford | Bob Corker | Oct 11 | 1 | 48% | 46% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Oct 09 | 3 | 46% | 48% | SurveyUSA | |
| Tennessee | Harold Ford | Bob Corker | Oct 01 | 4 | 48% | 43% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Oct 01 | 5 | 50% | 45% | Gallup | |
| Tennessee | Harold Ford | Bob Corker | Oct 02 | 8 | 40% | 40% | Zogby | |
| Tennessee | Harold Ford | Bob Corker | Sep 28 | 4 | 43% | 42% | Mason-Dixon | |
| Tennessee | Harold Ford | Bob Corker | Sep 30 | 12 | 42% | 43% | Middle Tenn. State U. | |
| Tennessee | Harold Ford | Bob Corker | Sep 25 | 7 | 42% | 48% | Zogby | |
| Tennessee | Harold Ford | Bob Corker | Sep 11 | 3 | 48% | 45% | SurveyUSA | |
| Tennessee | Harold Ford | Bob Corker | Sep 05 | 1 | 44% | 45% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Sep 05 | 8 | 43% | 45% | Zogby | |
| Tennessee | Harold Ford | Bob Corker | Aug 21 | 7 | 44% | 48% | Zogby | |
| Tennessee | Harold Ford | Bob Corker | Aug 09 | 1 | 42% | 48% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Jul 19 | 3 | 36% | 49% | Mason-Dixon | |
| Tennessee | Harold Ford | Bob Corker | Jul 16 | 1 | 37% | 49% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Jul 19 | 9 | 44% | 43% | Zogby | |
| Tennessee | Harold Ford | Bob Corker | Jul 16 | 12 | 35% | 42% | U. of Tennessee | |
| Tennessee | Harold Ford | Bob Corker | Jun 19 | 9 | 42% | 41% | Zogby | |
| Tennessee | Harold Ford | Bob Corker | May 01 | 1 | 39% | 43% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Mar 27 | 9 | 43% | 41% | Zogby | |
| Tennessee | Harold Ford | Bob Corker | Feb 27 | 1 | 35% | 39% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Jan 17 | 1 | 40% | 42% | Rasmussen | |
| Tennessee | Harold Ford | Bob Corker | Jan 05 | 1 | 41% | 42% | Zogby | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Nov 08 | 1 | 36% | 62% | Election 2006 | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Nov 05 | 10 | 29% | 65% | Polimetrix | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Oct 27 | 5 | 36% | 55% | Zogby | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Oct 23 | 1 | 34% | 60% | Rasmussen | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Oct 16 | 7 | 28% | 60% | Zogby | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Sep 05 | 8 | 39% | 48% | Zogby | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Aug 31 | 1 | 32% | 58% | Rasmussen | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Aug 21 | 7 | 37% | 55% | Zogby | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Aug 03 | 1 | 31% | 61% | Rasmussen | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Jul 19 | 9 | 37% | 52% | Zogby | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Jul 13 | 1 | 31% | 58% | Rasmussen | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Jun 19 | 9 | 33% | 57% | Zogby | |
| Texas | Barbara Radnofsky | Kay Hutchison* | May 18 | 1 | 34% | 53% | Rasmussen | |
| Texas | Barbara Radnofsky | Kay Hutchison* | May 01 | 1 | 25% | 64% | Rasmussen | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Mar 27 | 9 | 31% | 60% | Zogby | |
| Texas | Barbara Radnofsky | Kay Hutchison* | Jan 05 | 1 | 32% | 57% | Zogby | |
| Utah | Pete Ashdown | Orrin Hatch* | Nov 08 | 1 | 31% | 62% | Election 2006 | |
| Utah | Pete Ashdown | Orrin Hatch* | Nov 03 | 4 | 31% | 61% | Mason-Dixon | |
| Utah | Pete Ashdown | Orrin Hatch* | Nov 05 | 10 | 34% | 66% | Polimetrix | |
| Utah | Pete Ashdown | Orrin Hatch* | Nov 01 | 3 | 31% | 61% | Mason-Dixon | |
| Utah | Pete Ashdown | Orrin Hatch* | Nov 02 | 7 | 28% | 62% | Dan Jones | |
| Utah | Pete Ashdown | Orrin Hatch* | Sep 28 | 4 | 25% | 62% | Dan Jones | |
| Utah | Pete Ashdown | Orrin Hatch* | Aug 24 | 3 | 27% | 61% | Mason-Dixon | |
| Utah | Pete Ashdown | Orrin Hatch* | Jul 20 | 7 | 21% | 63% | Dan Jones | |
| Utah | Pete Ashdown | Orrin Hatch* | Mar 30 | 4 | 16% | 57% | Dan Jones | |
| Vermont | Bernie Sanders | Rich Tarrant | Nov 08 | 1 | 32% | 65% | Election 2006 | |
| Vermont | Bernie Sanders | Rich Tarrant | Oct 26 | 1 | 36% | 57% | Research 2000 | |
| Vermont | Bernie Sanders | Rich Tarrant | Oct 24 | 2 | 36% | 57% | Research 2000 | |
| Vermont | Bernie Sanders | Rich Tarrant | Sep 24 | 1 | 32% | 64% | Rasmussen | |
| Vermont | Bernie Sanders | Rich Tarrant | Sep 19 | 2 | 33% | 58% | Research 2000 | |
| Vermont | Bernie Sanders | Rich Tarrant | Sep 14 | 2 | 40% | 55% | ARG | |
| Vermont | Bernie Sanders | Rich Tarrant | Aug 03 | 1 | 34% | 62% | Rasmussen | |
| Vermont | Bernie Sanders | Rich Tarrant | Jul 27 | 2 | 35% | 56% | ARG | |
| Vermont | Bernie Sanders | Rich Tarrant | May 09 | 1 | 29% | 67% | Rasmussen | |
| Vermont | Bernie Sanders | Rich Tarrant | May 06 | 2 | 24% | 61% | Research 2000 | |
| Virginia | Jim Webb | George Allen* | Nov 08 | 1 | 50% | 49% | Election 2006 | |
| Virginia | Jim Webb | George Allen* | Nov 05 | 3 | 52% | 44% | SurveyUSA | |
| Virginia | Jim Webb | George Allen* | Nov 04 | 4 | 46% | 49% | Gallup | |
| Virginia | Jim Webb | George Allen* | Nov 02 | 1 | 49% | 49% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Nov 03 | 3 | 46% | 45% | Mason-Dixon | |
| Virginia | Jim Webb | George Allen* | Nov 03 | 3 | 46% | 49% | Gallup | |
| Virginia | Jim Webb | George Allen* | Nov 05 | 10 | 50% | 50% | Polimetrix | |
| Virginia | Jim Webb | George Allen* | Oct 29 | 1 | 48% | 46% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Oct 29 | 4 | 50% | 46% | Opinion Research | |
| Virginia | Jim Webb | George Allen* | Oct 30 | 7 | 45% | 44% | Zogby | |
| Virginia | Jim Webb | George Allen* | Oct 29 | 8 | 42% | 45% | Roanoke Coll. | |
| Virginia | Jim Webb | George Allen* | Oct 27 | 5 | 51% | 47% | Zogby | |
| Virginia | Jim Webb | George Allen* | Oct 24 | 1 | 48% | 49% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Oct 24 | 3 | 46% | 49% | SurveyUSA | |
| Virginia | Jim Webb | George Allen* | Oct 23 | 4 | 47% | 44% | LA Times | |
| Virginia | Jim Webb | George Allen* | Oct 19 | 3 | 43% | 47% | Mason-Dixon | |
| Virginia | Jim Webb | George Allen* | Oct 16 | 7 | 47% | 50% | Zogby | |
| Virginia | Jim Webb | George Allen* | Oct 12 | 1 | 44% | 47% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Oct 12 | 3 | 47% | 49% | Washington Post | |
| Virginia | Jim Webb | George Allen* | Oct 01 | 4 | 43% | 49% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Oct 01 | 5 | 45% | 48% | Gallup | |
| Virginia | Jim Webb | George Allen* | Oct 02 | 8 | 37% | 48% | Zogby | |
| Virginia | Jim Webb | George Allen* | Sep 28 | 3 | 44% | 50% | SurveyUSA | |
| Virginia | Jim Webb | George Allen* | Sep 26 | 3 | 44% | 49% | SurveyUSA | |
| Virginia | Jim Webb | George Allen* | Sep 27 | 5 | 43% | 43% | Mason-Dixon | |
| Virginia | Jim Webb | George Allen* | Sep 25 | 7 | 44% | 49% | Zogby | |
| Virginia | Jim Webb | George Allen* | Sep 12 | 1 | 43% | 50% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Sep 12 | 3 | 45% | 48% | SurveyUSA | |
| Virginia | Jim Webb | George Allen* | Sep 07 | 3 | 42% | 46% | Mason-Dixon | |
| Virginia | Jim Webb | George Allen* | Sep 05 | 8 | 50% | 43% | Zogby | |
| Virginia | Jim Webb | George Allen* | Aug 20 | 3 | 45% | 47% | SurveyUSA | |
| Virginia | Jim Webb | George Allen* | Aug 21 | 7 | 48% | 47% | Zogby | |
| Virginia | Jim Webb | George Allen* | Aug 16 | 1 | 42% | 47% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Jul 27 | 3 | 32% | 48% | Mason-Dixon | |
| Virginia | Jim Webb | George Allen* | Jul 18 | 1 | 39% | 50% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Jul 19 | 9 | 41% | 52% | Zogby | |
| Virginia | Jim Webb | George Allen* | Jun 27 | 3 | 37% | 56% | SurveyUSA | |
| Virginia | Jim Webb | George Allen* | Jun 19 | 9 | 44% | 49% | Zogby | |
| Virginia | Jim Webb | George Allen* | Jun 14 | 1 | 41% | 51% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Apr 11 | 1 | 41% | 51% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Mar 27 | 9 | 42% | 49% | Zogby | |
| Virginia | Jim Webb | George Allen* | Mar 15 | 1 | 30% | 54% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Feb 08 | 1 | 37% | 49% | Rasmussen | |
| Virginia | Jim Webb | George Allen* | Jan 05 | 1 | 38% | 49% | Zogby | |
| Washington | Maria Cantwell* | Mike McGavick | Nov 08 | 1 | 57% | 40% | Election 2006 | |
| Washington | Maria Cantwell* | Mike McGavick | Nov 02 | 3 | 54% | 38% | Mason-Dixon | |
| Washington | Maria Cantwell* | Mike McGavick | Nov 05 | 10 | 57% | 43% | Polimetrix | |
| Washington | Maria Cantwell* | Mike McGavick | Oct 30 | 4 | 51% | 43% | SurveyUSA | |
| Washington | Maria Cantwell* | Mike McGavick | Oct 31 | 7 | 53% | 41% | U. of Washington | |
| Washington | Maria Cantwell* | Mike McGavick | Oct 26 | 1 | 52% | 41% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | Oct 27 | 5 | 50% | 46% | Zogby | |
| Washington | Maria Cantwell* | Mike McGavick | Oct 19 | 3 | 52% | 37% | Mason-Dixon | |
| Washington | Maria Cantwell* | Mike McGavick | Oct 17 | 1 | 53% | 38% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | Oct 15 | 3 | 51% | 43% | SurveyUSA | |
| Washington | Maria Cantwell* | Mike McGavick | Oct 16 | 7 | 52% | 45% | Zogby | |
| Washington | Maria Cantwell* | Mike McGavick | Sep 27 | 4 | 50% | 40% | Mason-Dixon | |
| Washington | Maria Cantwell* | Mike McGavick | Sep 25 | 5 | 54% | 42% | SurveyUSA | |
| Washington | Maria Cantwell* | Mike McGavick | Sep 25 | 7 | 50% | 43% | Zogby | |
| Washington | Maria Cantwell* | Mike McGavick | Sep 20 | 1 | 48% | 42% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | Sep 06 | 1 | 52% | 35% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | Sep 05 | 8 | 50% | 42% | Zogby | |
| Washington | Maria Cantwell* | Mike McGavick | Aug 29 | 2 | 53% | 36% | SurveyUSA | |
| Washington | Maria Cantwell* | Mike McGavick | Aug 21 | 7 | 51% | 43% | Zogby | |
| Washington | Maria Cantwell* | Mike McGavick | Aug 15 | 1 | 46% | 40% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | Jul 18 | 1 | 48% | 37% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | Jul 19 | 9 | 49% | 42% | Zogby | |
| Washington | Maria Cantwell* | Mike McGavick | Jul 13 | 3 | 37% | 33% | Elway | |
| Washington | Maria Cantwell* | Mike McGavick | Jun 22 | 3 | 45% | 35% | Elway | |
| Washington | Maria Cantwell* | Mike McGavick | Jun 19 | 9 | 48% | 43% | Zogby | |
| Washington | Maria Cantwell* | Mike McGavick | Jun 13 | 1 | 44% | 40% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | May 08 | 1 | 46% | 41% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | Apr 23 | 4 | 52% | 33% | Elway | |
| Washington | Maria Cantwell* | Mike McGavick | Apr 04 | 1 | 48% | 40% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | Mar 27 | 9 | 49% | 42% | Zogby | |
| Washington | Maria Cantwell* | Mike McGavick | Mar 07 | 1 | 49% | 36% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | Feb 09 | 4 | 55% | 35% | Elway | |
| Washington | Maria Cantwell* | Mike McGavick | Jan 24 | 1 | 50% | 36% | Rasmussen | |
| Washington | Maria Cantwell* | Mike McGavick | Jan 05 | 1 | 50% | 41% | Zogby | |
| West Virginia | Robert Byrd* | John Raese | Nov 08 | 1 | 64% | 34% | Election 2006 | |
| West Virginia | Robert Byrd* | John Raese | Nov 05 | 10 | 67% | 33% | Polimetrix | |
| West Virginia | Robert Byrd* | John Raese | Sep 05 | 1 | 63% | 30% | Rasmussen | |
| West Virginia | Robert Byrd* | John Raese | Aug 01 | 1 | 56% | 31% | Rasmussen | |
| West Virginia | Robert Byrd* | John Raese | Apr 25 | 1 | 57% | 34% | Rasmussen | |
| Wisconsin | Herb Kohl* | Robert Lorge | Nov 08 | 1 | 67% | 30% | Election 2006 | |
| Wisconsin | Herb Kohl* | Robert Lorge | Nov 05 | 10 | 69% | 24% | Polimetrix | |
| Wisconsin | Herb Kohl* | Robert Lorge | Oct 27 | 5 | 47% | 38% | Zogby | |
| Wisconsin | Herb Kohl* | Robert Lorge | Oct 26 | 9 | 73% | 16% | U. of Wisconsin | |
| Wisconsin | Herb Kohl* | Robert Lorge | Oct 16 | 7 | 50% | 34% | Zogby | |
| Wisconsin | Herb Kohl* | Robert Lorge | Sep 14 | 1 | 60% | 33% | Rasmussen | |
| Wisconsin | Herb Kohl* | Robert Lorge | Sep 05 | 8 | 50% | 35% | Zogby | |
| Wisconsin | Herb Kohl* | Robert Lorge | Aug 18 | 1 | 59% | 31% | Rasmussen | |
| Wisconsin | Herb Kohl* | Robert Lorge | Aug 21 | 7 | 51% | 33% | Zogby | |
| Wisconsin | Herb Kohl* | Robert Lorge | Jul 12 | 1 | 60% | 27% | Rasmussen | |
| Wisconsin | Herb Kohl* | Robert Lorge | Jul 02 | 10 | 63% | 14% | Diversified Research | |
| Wisconsin | Herb Kohl* | Robert Lorge | Apr 20 | 1 | 56% | 26% | Rasmussen | |
| Wyoming | Dale Groutage | Craig Thomas* | Nov 08 | 1 | 30% | 70% | Election 2006 | |
| Wyoming | Dale Groutage | Craig Thomas* | Oct 12 | 4 | 26% | 67% | Mason-Dixon | |
| Wyoming | Dale Groutage | Craig Thomas* | Jul 06 | 1 | 32% | 59% | Rasmussen | |
| Wyoming | Dale Groutage | Craig Thomas* | Apr 27 | 1 | 25% | 64% | Rasmussen | |
| Wyoming | Dale Groutage | Craig Thomas* | Feb 01 | 3 | 17% | 63% | Mason-Dixon | |
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