What's at stake for Bernie Sanders and Joe Biden in tonight's Democratic primaries
More than 350 delegates are at stake in tonight's Democratic primaries across six states. CBSN political reporter Caitlin Huey-Burns, CBS News correspondent Nikole Killion, CBS News political director Caitlin Conant, and Adam Brewster, a CBS News campaign reporter covering Michigan, spoke to CBSN's Elaine Quijano ahead of the polls closing.