I expect to hear Bush DENY this - if he doesn't he will have NO Christian base left at all. Hopefully this is BS.
Sometimes these accusations are made just to force an embarrasing denial. Once you have to start arguing that you are NOT a religious nut (or a racist, or a crook) you are already on the ropes. You are giving more attention, and thus credibility, to the accusation than it deserves. Sometimes you have to ignore these baseless accusations or have a subordinate(s) go out there calling it "absurd".