He went with the money, not the voters. The latest AP poll shows Americans oppose gay marriage by a 42 percent to 40 percent margin with a suspiciously large number of people (15 percent) claiming to have no opinion on the subject. (In state battles these voters turn out on Election Day to be almost all anti-gay-marriage voters.)
According to AP:
Overall, [President Obama’s] announcement last month that he supported gay marriage did little to shift the nation’s views on the subject. . . .
In the poll, 42 percent of respondents oppose gay marriage, 40 percent support it and 15 percent are neutral. Last August, the country was similarly divided over whether same-sex couples should be allowed to be legally married in their state, with 45 percent opposing, 42 percent favoring and 10 percent neutral. . . .
But his announcement may have fired up the right against him. More Republicans and conservatives said they strongly disapproved of his handling of the issue now than before; 53 percent of Republicans said that, compared with 45 percent in August, and 52 percent of conservatives say as much now, up from 43 percent back then.