1. President Trump had much praise for the groundbreaking summit meeting between the leaders of North and South Korea, and declared that in his own planned talks with the North he would not be fooled the way he said his predecessors had been.

“The United States has been played beautifully, like a fiddle, because you had a different kind of a leader,” Mr. Trump said. “We’re not going to be played, O.K.?”

Mr. Trump spoke after the Korean leaders agreed to work to remove all nuclear weapons from the Korean Peninsula and, within the year, pursue talks with the U.S. to declare an official end to the Korean War.