U.S. President Donald Trump and Ukrainian leader Volodymyr Zelenskiy, in Rome for the funeral of Pope Francis, met one-on-one in a marble-lined Vatican basilica on Saturday to try to revive faltering efforts to end Russia's war with Ukraine.

The 15-minute meeting was the first time they had come face-to-face since February's acrimonious encounter in the Oval Office.

In life, Francis bore the weight of the war — particularly repatriating the 19,000 Ukrainian kids who have been deported to Russia, according to Joe Donnelly, the most recent U.S. ambassador to the Holy See, who spoke with Playbook today from Rome, where he had just attended the funeral.