President Trump abruptly canceled on Thursday the highly anticipated summit meeting with Kim Jong-un, the leader of North Korea, that was scheduled to take place on June 12. In a letter to Mr. Kim announcing his decision, Mr. Trump wrote, “The world, and North Korea in particular, has lost a great opportunity for lasting peace.” Guest: Mark Landler, who covers the White House for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily.