Well, I’ll cop to it, even if some others won’t.
I would have no trouble with an atheist president, or a Mormon, or any of the other belief systems commonplace to the western world.
As others far more clever than I have said, we’re not electing a pope/bishop/whatever, we’re electing the president of a republic, the constitution of which appears to be an entirely secular document, regardless of how religion may have informed the beliefs of its writers.
(ducking)
Don’t duck, I like to tweak people by pointing out that the Lord is mentioned in the constitution on the Signatory page (Article VII)