Bernie Sanders, the Vermont independent, became an ideological leader in the Democratic Party after his 2016 campaign against Hillary Clinton. He faces a far more crowded and liberal field this time. Plus, A new NPR/PBS NewsHour/Marist poll finds the majority of Americans oppose the president's national emergency declaration, don't believe there is an emergency and believe Trump's misusing his power. This episode: political reporter Danielle Kurtzleben, political reporter Asma Khalid, and political editor Domenico Montanaro. Email the show at email@example.com. Find and support your local public radio station at npr.org/stations.