So specifically, what faiths are okay for our President to be?
What do you mean by "OK?"
(OK by whose standards?)
I mean if you look, for example, in OT times, who at times did God "put in charge" over Israel? If it wasn't some foreign hostile enemies, even when Israel had its own ruler integrity, the bulk of them did not "fear the Lord." I mean, at times, God in His sovereignty simply seemingly concluded, "They get who they want (or deserve)."
So, since the sovereign God has placed even wicked leaders into place with whom I disagree, my "OK" ultimately means nothing. (I mean even 2 Cor. 4:4 and 1 John 5:19 tells us that Satan is the "god" of this age/world...he's not exactly a global leader I would pick...but we wicked, evil, unrighteous folks deserve who we get.)
Now, a different question might be, "What kind of leaders might help our country to be steered in a more edifying public policy and spiritual direction?"
ANY faith is okay for our President. Though I might have an issue with a Muslim based on the current war on terror.
However, I would be most comfortable with someone most like me: a conservative Protestant, but more importantly someone who holds to a conservative theological interpretation of the Bible which informs his or her opinions and decisions.
That doesn’t mean I wouldn’t vote for someone of a different faith since it’s far more important to me what stance they have on the important issues of the day, only some of which have a firm basis in religious and moral beliefs.
Romney gives me pause, but not so much due to his religion as his lack of a solid and long-established history of commitment to causes that I feel are important.