Weekly Roundup: Thursday, March 14 : The NPR Politics Podcast Beto O'Rourke announces that he will run for president. Plus, the Senate votes to block Trump's national emergency declaration that would give him the money for his wall. This episode: political editor Domenico Montanaro, political reporter Danielle Kurtzleben, editor correspondent Ron Elving, national political correspondent Mara Liasson, and Congressional correspondent Sue Davis. Email the show at email@example.com. Find and support your local public radio station at npr.org/stations.