Politics and the Fight Over Faith

Ben Carson backs down on his comments about Muslims and Carly Fiorina rallies into second place.
2:02 | 09/23/15

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Transcript for Politics and the Fight Over Faith
the race for 2016. Ben Carson under fire for those controversy comments, saying the American president should not be Muslim. Tonight, now, appearing to perhaps waiver a bit. Meanwhile, the candidate surging to second place, Carly fiorina diving into this debate, as well. ABC's Tom llamas reporting in tonight. That first Christmas we're going to have a bang up celebration at the white house. Reporter: In Ohio today, Dr. Ben Carson touting his Christian faith, but seeming to back away from these comments about muslims. I would not advocate that we put a Muslim in charge of this nation. I absolutely would not agree with that. Reporter: Carson now tells me he would have no problem with a Muslim president, but they would have to prove they'd choose the constitution over the Koran. Traditionally Islam doesn't separate church and state. So, they obviously are going to have to do a fairly significant departure from what they traditionally do, which is fine. Reporter: But are you asking for a special test if a Muslim was running for president? No, if it was a Christian running for president, but they wanted to impose a theocracy, I would not support that, either. Reporter: Carson's Facebook profile has grown by more than 100,000 likes since his comments Sunday. But not a single candidate has come out to support him. Rising star Carly fiorina calling him out on late night. I think that's wrong. You know it says in our constitution that religion cannot be a test for office. Reporter: Fiorina riding high since the last debate, even breaking into song. And on the flip side, Scott walker tweeting this picture today. Back at work in Wisconsin after dropping out of the race and encouraging others to do the same. So that the voters can focus on a limited number of candidates who can offer a positive, conservative alternative to the current front-runner. Reporter: Walker talking about Donald Trump. David, now that the Wisconsin governor is out of the state, many of his staffers have jumped to other campaigns, like Jeb bush, Marco Rubio and Ted Cruz. What every campaign wants right now, some of the big donors that initially supported walker.

This transcript has been automatically generated and may not be 100% accurate.

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