Senate Retirements 2016
Senator State Party First elected Reason
Barbara Boxer California Dem 1992 The 4-term liberal icon could go on forever, but at 74 she's had it
Dan Coats Indiana GOP 1988, 2010 He served two terms earlier, retired, came back. Enough already
Barbara Mikulsky Maryland Dem 1986 She would be 87 at the end of another term
Harry Reid Nevada Dem 1986 He's 75 now and didn't relish another bitter campaign
David Vitter Louisiana GOP 2005 Too many scandals and losses