Peggy Flanagan won the Minnesota Democratic Senate primary on Tuesday in the latest victory for an insurgent progressive over the party’s establishment. She was also backed by the retiring incumbent, Democratic Sen. Tina Smith. The result was another sign of progressive energy among Democratic primary voters. Meanwhile, Lisa Demuth won the Republican primary for Minnesota governor. Demuth, the state House speaker, will face U.S. Sen. Amy Klobuchar, who defeated six others to win the Democratic nomination.