Opinions about the Mormon religion are a factor in how GOP voters view Romney. Roughly six-in-ten (61%) Republican and Republican-leaning voters who say that Mormonism is a Christian religion have a favorable opinion of Romney. That compares with 51% of those who say that it is not a Christian religion. And Republican voters who say Mormonism is not Christian are far less likely to support Romney for the GOP nomination.

But these same Republicans also are among the strongest critics of Obama. Nearly six-in-ten Republican voters (58%) who do not view Mormonism as Christian have a very unfavorable opinion of Obama; that compares with 44% of those who say it is Christian.

And support for Romney in a general election matchup with Obama is just as high among Republican voters who say Mormonism is not a Christian religion as among those who say it is (89% and 86%, respectively).