This meeting should never have been permitted, "While he would love to meet the president for now, His Holiness has a very full schedule planned years in advance, (and whatnot...)"  The Vatican has centuries of diplomatic practice, certainly something could have been thought up to keep him away.   The meeting is only going to allow the "president for now" to grab a world class photo/op at the pope's expense.  If Frank thinks he can do anything to change #45's monstrous outlook on humanity, he is going to be sorely disappointed.