That seems like a reasonable assumption to me given the attitudes of the Christian conservative right – but it is one that no one can talk about without looking like a bigot.

I doubt if it would matter much what religion the President is under normal circumstances because personal beliefs get suppressed for political reasons. However, if is ever came to a crunch over a religious issue, say a clash with Islam, then the personal beliefs of the Commander in Chief could be highly influential.

I would prefer a Mormon President in that situation than a conservative, end-times-believing protestant.

Catholics are so pragmatic, tolerant, and accustomed to ignoring their church hierarchy, and their books, so that faith in a President would not make much difference.

Best of all would be a Chief who believes that all religions are bull shit, and who has made up his own mind using reason, education, and expert advice, in a consistent manner over his entire life.