I can imagine this scene back in the White House after the visit:
PENCE: So how did your visit with the Pope go?
TRUMP: It seemed to go OK, except for the high humidity and the Pope's mumbling about exercise.
PENCE: High humidity?
TRUMP: What else would explain random drops of water that kept falling on me during the whole visit?
PENCE: Hmmm, that's peculiar but maybe this tree-hugging Pope was keeping the air conditioner down to save energy.
But why would he mumble about exercise?
TRUMP: Beats me, but every time I was talking I could hear him mumbling to himself something that sounded like 
"Exorcizo te, omnis spiritus immunde..."