More than half of Americans say they approve of President Obama's stance that same-sex couples should be allowed to marry legally, but 60% say that his shift in position will have no bearing on how they vote in the November election, according to a new USA TODAY/Gallup poll.

Overall, 51% approve of Obama's new position on same-sex marriage, compared with 45% who disapprove. Nearly 13% say his shift in position will make them more likely to vote for him, while 26% say it will make them less likely, suggesting that more supporters of likely GOP nominee Mitt Romney feel more strongly about this issue than do base supporters of Obama.