Senator Bernie Sanders said Minnesota’s Democratic Senate primary between progressive Lieutenant Governor Peggy Flanagan and moderate Representative Angie Craig would be close. His assessment matters because the contest is viewed as a test of whether the Democratic Party’s progressive or centrist wing has greater influence ahead of the midterm elections.

Sanders has endorsed Flanagan, who is campaigning on progressive policies and support from grassroots activists, while Craig presents herself as a pragmatic candidate with broader electoral appeal. The primary is scheduled for 11 August and will determine the Democratic candidate to succeed retiring Senator Tina Smith. The race has drawn national attention, outside spending and prominent endorsements, reflecting wider divisions within the party.