A new poll shows almost a third of Americans hold an unfavorable view of the Mormon religion, which could complicate the presidential aspirations of two top Republicans.

Former Massachusetts Gov. Mitt Romney and former Utah Gov. Jon Huntsman, who is expected to enter the GOP field, are both members of the Church of Jesus Christ of Latter-Day Saints (LDS).

A new Quinnipiac University poll shows 32 percent of voters have an unfavorable view of the Mormon faith, while 45 percent of voters say they have a favorable opinion of the religion.

Only 25 percent of the 1,946 registered voters who responded to the survey said their religion and Mormonism are "very or somewhat similar." The poll, released Wednesday, has a margin of error of plus or minus 2.2 percent.

"The fact that less than half of voters have a favorable view of the religion is likely to be a political issue that Gov. Mitt Romney, and should his campaign catch on, Gov. Jon Huntsman, will have to deal with as they pursue the White House," Peter Brown, assistant director of the Quinnipiac University Polling Institute, said in a statement.

Romney, who led the GOP field in the Quinnipiac poll, faced questions about his religion during a CNN interview that aired Tuesday night.

"I'm not a spokesman for my church. And one thing I'm not going to do in running for president is become a spokesman for my church or apply a religious test that is simply forbidden by the Constitution. I'm not going there," Romney said, according to a transcript by ABC News. "If you want to learn about my church, talk to my church."