It is certainly a valid and distressing question whether a vocal Christian can get elected to high office in 21st century America. Even on this site, there are a number of posters who use Carson’s religious views as evidence of disqualification. Just sad to see, that’s all.
Nothing wrong with one's religious positions at all, actually. The problem is when you have a group of voters who are voting purely on religion, and then, don't even have any logical standards in their own religious vote! If you're claiming to be a Church Lady, why would you vote for someone who is, say, a Mormon or in a goofy group like the SDA, even going so far as to defend their religion? Just doesn't make any sense. And I conclude it's because these people don't think when they're voting.
Let us hope these awful people will be a minority in the primary voting booth!