This episode: President Trump is backing down from his threat to shut down the U.S. Southern border .Trump had issued the warning in a bid to curtail surging border crossings by asylum-seekers from Central America. And congressional Democrats attempt to get Trump's tax returns. White House correspondent Tamara Keith, national political correspondent Mara Liasson, justice reporter Ryan Lucas, political reporter Tim Mak and chief economics correspondent Scott Horsley. Email the show at nprpolitics@npr.org. Find and support your local public radio station at npr.org/stations.