Sen. Bernie Sanders will campaign for Montana Democratic congressional candidate Rob Quist in four cities over two days next weekend.

Sanders, who won the Democratic presidential primary in Montana over Hillary Clinton last year, will appear at rallies with Quist in Missoula, Butte, and Billings on Saturday, and in Bozeman on Sunday.

Quist, a musician, is positioning himself as a populist candidate in a vein similar to Sanders. He supports single-payer health care, wants to protect federally owned public lands in Montana, and has drawn attention to the fact that his opponent, Republican Greg Gianforte, is a millionaire like many other members of Congress.