President Trump says that he will order an investigation into whether the FBI and the Department of Justice "infiltrated or surveilled" his campaign "for political purposes," potentially setting up a showdown between the president and his intelligence and law enforcement agencies. This episode: Congressional correspondent Scott Detrow, justice correspondent Carrie Johnson, and national political correspondent Mara Liasson. Email the show at nprpolitics@npr.org. Find and support your local public radio station at npr.org/stations.