With Rick Perry's withdrawal from the presidential nomination race, the Republican Party is down to Romney the Mormon, Santorum the traditional Catholic, Gingrich the newcomer Catholic, and Ron Paul.
Ron Paul is a libertarian. Libertarians are mostly unreligious, and a strong segment, like Jesse Ventura, regard religion as a crutch for the weak.
But Ron Paul also attends a Baptist church, is pro-life, and has been on both sides of the gay marriage issue.
I think Paul has not fully worked out the relationship between his religious views and his political views. He is clearly against the federal government being involved in moral and religious matters, as a strict libertarian would be. But whether he would support or oppose the Christian Right position at the state level is not clear.
In any case, the Republican Party, which has made evangelical Protestants the foundation of its base for a generation, has now run out of any clear socially conservative evangelical candidates for president.