Peggy Flanagan won the Minnesota Democratic Senate primary, defeating Angie Craig. This victory signals a progressive shift within the Democratic Party. Flanagan will now face Republican Michele Tafoya in the general election. Republicans see an opportunity in Minnesota's divided political landscape. Lisa Demuth secured the Republican nomination for governor.

Minnesota's Democratic Senate primary has become the latest test of the party's divide between moderates and progressives.

Minnesota Democrats will decide a competitive U.S. Senate primary Tuesday in another face-off between moderate and progressive candidates that could define the party’s identity…