The justice department opens a criminal investigation into the basis of the Russia investigation. Plus, Mark Zuckerberg appears on Capitol Hill, and the House Ethics Committee investigates freshman representative Katie Hill. This episode: Congressional correspondent Susan Davis, political correspondent Asma Khalid, justice correspondent Ryan Lucas, political reporter Tim Mak, and senior editor & correspondent Domenico Montanaro. Email the show at nprpolitics@npr.org. Find and support your local public radio station at npr.org/stations.