Weekly Roundup: Thursday, May 31 Secretary of State Mike Pompeo is meeting with a top North Korean delegate to prepare for a potential summit, but do the two countries agree on what it means to "denuclearize?" President Trump surprised the world when he announced today that tariffs on Canada, Mexico, and the EU go into effect at midnight tonight. Plus, President Trump pardons another controversial figure. This episode: Congressional correspondent Scott Detrow, White House reporter Ayesha Rascoe, White House correspondent Scott Horsley, national political correspondent Mara Liasson, and national security and political reporter Tim Mak. Email the show at firstname.lastname@example.org. Find and support your local public radio station at npr.org/stations.