Regarding the question you asked the Baptist Preacher,
"Do you think the President is a Christian?"
Honestly I don't even know "why" you are concerned about it.
Unless of course it is for the sole purpose of your trying to get him re-elected. (Winning him more votes.)
If this is the case, THAT, in and of itself, would go against the very - principles of the Christian faith - you were so passionately declaring our current President upholds.
Furthermore, I can't imagine you would put the President in such an awkward political position being that IF this were the case, I am almost certain the President would not wish for you to participate in this type of bargaining for "votes". (especially on video and the world wide web). Almost.