Top progressives endorsed Forstag, who could be Democrats’ next blue-collar sensation. A union leader and firefighter named Sam Forstag is the projected winner of a Democratic primary in Montana. Forstag defeated three other Democrats — Ryan Busse, Russell Cleveland and Matt Rains — likely thanks in part to endorsements from leading progressives Sen. Bernie Sanders (I-Vt.), Rep. Alexandria Ocasio-Cortez (D-N.Y.) and Rep. Jamie Raskin (D-Md.). Forstag will face the winner of the Republican