"I think a lot of people, not just social conservatives, but a lot of the Republicans I know are not necessarily comfortable with Romney," Huckabee told CBSNews.com. "But it has nothing to do with religion. It has everything to do with inconsistencies in positions he's held, and that's it."
In response to buzz about the former Massachusetts governor becoming McCain's running mate, an alliance of Ohio social conservatives, many of whom are former Huckabee supporters, have formed a group called "Social Conservatives Against Romney." Romney had moderate positions on many hot-button social issues, including abortion, before his run for president.
Huckabee has also been discussed as a potential running mate for McCain, though he is seen as a long-shot possibility.
Evangelical leader Richard Land, president of the Southern Baptist Convention's Ethics and Religious Liberty Commission, told CBSNews.com last week that Romney "would be an excellent choice" for McCain.
"There are people in the evangelical community who would have a problem with his Mormonism," he added. "I am not one of them. I mean, I'm very clear that I do not believe Mormonism is a Christian faith. But that does not disqualify someone from being President or Vice President. And my guess would be that, probably, about 15 to 20 percent of the evangelical community would have a problem with his Mormonism."