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Voters will cast ballots Tuesday in six states: Michigan, Mississippi, Missouri, Idaho, North Dakota, and Washington.

In what some pundits are calling a “second Super Tuesday,” Democratic presidential candidates Joe Biden and Bernie Sanders are competing for 352 delegates in primaries across six states today: Michigan, Mississippi, Missouri, Idaho, North Dakota, and Washington.

Biden starts with an 80-delegate edge over Sanders and fresh endorsements from Sens. Cory Booker and Kamala Harris, but a strong performance by Sanders could reframe the race as much more competitive. In 2016, Sanders won both Michigan and Washington, the states with the most delegates out of the six. 

Still, Sanders is facing a much-changed political landscape. Fewer caucuses, which Sanders has historically performed well with, and the rise of mail-in ballots (Washington has no in-person polls this year, opting to hold the primary entirely by mail) are seen as disadvantages to the senator.    

“Right now, at this hour, at this moment, it looks like Joe Biden has the momentum to move forward, and Bernie is in survive-and-advance mode,” Kelly Dietrich, the founder and head of the National Democratic Training Committee, told The Hill. “He needs to come out [tonight] closing the gap in delegates and still have a path to victory moving forward.”

Polls close between 8 p.m. and 11 p.m. ET.