• While in Warsaw, Mr. Trump gave what our correspondents described as a “dark and confrontational” speech, casting himself as the defender of Western values in a clash of civilizations and asking “whether the West has the will to survive.”

Mr. Trump affirmed his commitment to NATO, and condemned Russia’s “destabilizing behavior,” though he cast doubt on whether it hacked into the Democratic National Committee. More notably, he attacked his own country’s leaders and institutions — the media, Barack Obama and U.S. intelligence agencies — in front of appreciative Polish leaders.

Today, the focus will be on Mr. Trump’s first face-to-face with Russia’s leader, Vladimir Putin, in which the Kremlin is betting it can upstage Mr. Trump.