This is what is implied repeatedly in a stunning interview with Franklin Graham (son of Billy) on Morning Joe today. You really need to see the entire video, which can be found in two parts on Mediaite.
Graham wants people to believe that the President is a christian (lower case intentional) of political convenience, and explains that he comes to this conclusion because Obama was told he needed to join a church in order to work as a community organizer in his Chicago days. So when asked if Obama was a Christian, Graham said that you would have to ask him- he could not say.
Thankfully, an "A" team was interviewing this morning, and Graham was asked if Santorum was a christian, to which he gave an unequivocal yes. And Newt? Yes again. On Romney he hedged a bit but repeated twice that most christians do not accept mormons as christian. So nice of him to clarify all of this for us.
My preference would be for all candidates to be secular humanists, but as it is impossible for anyone to be elected in this country without being a "man/woman of god" then this will likely be part of the dialogue for years to come. But watching Graham is like a window into the tiny little minds of many fundamentalists, and if you can stand to go there, it is very informative. Of course you get similar snapshots of medieval thinking when listening to Santorum, but that is another diary altogether.
It is a very creepy interview, but kudos to the Morning Joe crew for asking the right questions. Sorry I do know yet know how to imbed video.