Barack Obama endorsed Joe Biden in a twelve-minute video shared online Tuesday morning. So what does the former president's endorsement mean in an election cycle where Democrats have moved to his left and traditional campaigning has become impossible? This episode: campaign correspondent Asma Khalid, demographics and culture reporter Juana Summers, and national political correspondent Mara Liasson. Email the show at nprpolitics@npr.org Join the Facebook group at n.pr/politicsgroup Subscribe to our newsletter at npr.org/politicsnewsletter Find and support your local public radio station at donate.npr.org