Dem
47
GOP
53
Americans love easy wars with clear goals that are achieved quickly with minimal loss of American lives. How easy and quick this one will be remains to be seen. Nevertheless, initial polling is not encouraging for Donald Trump. Here is the poll from The Washington Post asking if people supported or opposed the strikes on Iran.
As you can see, Republicans love the strikes and Democrats don't. But here's the key: Look how independents break. They are 2:1 against the strikes. If they break 2:1 against the Republicans in November, to send Trump a message, there goes the House and maybe the Senate.
Here is the CNN poll without the undecdeds:
Basically, the same story: Independents don't like the strikes. CNN also asked another question: Should Trump get congressional approval for more strikes? Independents said yes by a margin of 4:1 (68% to 16%). In all polls on the war, look at the independents, since some of them are up for grabs and if they are heavily anti-Trump, that does not bode well for the Republicans in November.
A Reuters/Ipsos poll, taken just after hostilities started, had independents against the strikes 44% to 19% with 38% undecided. It appears that as time went on, some of the undecideds decided and they don't like what they are seeing. Historically, this has often been the case. Some people wait until they have more information and see how things are going before taking a position. This probably means that as the war goes on (and more American soldiers are killed and wounded), support will drop. Remember that even Vietnam was fairly popular, until it wasn't. And this one isn't even starting in "popular" territory.
For what it is worth, Fox News also ran a poll. Here are the crosstabs. It was conducted by Beacon Research (D) and Shaw (R) so it is probably legitimate. Here independents also oppose the strikes, but only 59% to 40%. The difference with the other polls could be due to question wording, how the respondents were located, and other factors. Whites, older people, conservatives, Catholics and Protestants, rural dwellers and former military are the biggest supporters of the war. Nonwhites (especially nonwhite women), young people, and liberals are the strongest opponents. (V)