With Mitt Romney's Mormon faith in the news, his beliefs are likely to be questioned during the second Republican presidential candidate debate tonight in South Carolina — and his answers could be a test of whether he can win over evangelical voters.

The 90-minute debate, which will be broadcast on the Fox News cable channel beginning at 7 p.m., comes after Romney used the word "bigoted" to describe a comment made by the Rev. Al Sharpton during a debate on religion that suggested Mormons don't believe in God.

Plus, Romney's membership in The Church of Jesus Christ of Latter-day Saints is also the focus of the current Time magazine's cover story and was covered in a "60 Minutes" interviewed that aired Sunday on CBS News.

"I'm sure it will come up in some form, the question of faith," said Kelly Patterson, director of Brigham Young University's Center for the Study of Elections and Democracy. "I'd be surprised if he wasn't, at some level, given an opportunity to provide his response."

Sharpton's comment that "as for the one Mormon running for office, those that really believe in God will defeat him anyway, so don't worry about that, that's a temporary situation," increases the likelihood faith will be a topic, Patterson said.

Sharpton, a Pentecostal minister and former Democratic presidential candidate, has apologized publicly to all Mormons and privately to LDS Church leaders for the comment. He is planning a visit to Utah to "create a dialogue" with church leaders.

The controversy, Patterson said, "keeps alive the theme seen throughout the campaign, which is what the impact of religion is on voters' choices," especially in conservative South Carolina, where some 40 percent of Republicans see themselves as evangelicals.

"It's a very appropriate question for South Carolina," said Andru Blonquist, a builder in Greenville, S.C., who attended BYU and serves as administrator for a pro-Romney blog, "South Carolinians for Romney," www.scforromney.com.

Blonquist said in a telephone interview that when South Carolinians first encounter his faith, "there's a lot of ignorance, there's a lot of misunderstanding. It's easy to picture a Mormon ... but it's a completely different thing to meet them and interact with them and realize they're normal people."

Blonquist said that's key for Romney, who has limited name recognition but holds appeal as the more conservative of the top-tier candidates, a list that also includes former New York City Mayor Rudy Giuliani and Arizona Sen. John McCain.