'Bannon is unlikely to want Trump to force American Catholics to choose between their president and their pope.'  

Dionne is myopic in the extreme.  Yes, Bannon will force this decision while he hides behind Trump. He considers Trump the Grey Ghost.   This is precisely why I think they will use bio/viral attacks to close the borders.  How many of us would say 'yes' to Ebola or some other derivative. I truly can't say I would disagree with closing the borders with a plague overseas. I sure hope the NSA folks are putting some dots together.