Pope Francis

The pope and the president share liberal stances on climate change and economic disparity. A theology scholar argues U.S. Catholic Church leadership is increasingly allied with the political right.

The "Urbi et Orbi" blessing is normally delivered at Christmas and Easter. The delivered his homily against the dramatic backdrop of an empty St. Peter's Square, glistening in the rain.

Bishops from the Amazon region had sought the changes to address a shortage of clergy. But some Roman Catholic conservatives warned that enacting them would lead to the end of clerical celibacy rules.

"If you sleep on the ground covered in cardboard and have to wake up at 5 a.m. before the police come to shove you away, and then you find a place like this, what more do you want?" a new guest says.

"It is injustice that turns them away from places where they might have hope for a dignified life, but instead find themselves before walls of indifference," the pontiff said in his holiday address.

The new name, Vatican Apostolic Archive, is meant to dispel the notion that the Holy See is hiding secrets in its ancient collection, the pope said.

The pope brought a tablet to his usual Sunday address, as he announced the ClickToPray app for communal prayer around the world, with a call for young Catholics to engage.

The pope, an outspoken advocate for refugees and migrants, urged the international community to set aside its differences and turn its attention to crises around the world.

As the pope departed for Rome Sunday night, his visit to Ireland only seemed to reinforce the decline of Roman Catholic authority in a country that was once synonymous with the faith.

Wednesday's meeting, which focused on pursuing peace, comes a year after the pope suggested that Trump "is not Christian" because of his plan for a U.S-Mexico border wall.