Wisconsin Democrats are launching a full-court press against Elon Musk as they look to use angry voter sentiment against him as a tool to turn out voters in the high-stakes Wisconsin Supreme Court

More than 170 Democratic activists had gathered at the public library in Sauk City, a small town in a quintessential swing county in the southern part of the state, to counteract Musk’s attempt to buy a Wisconsin Supreme Court election and tip the balance of power on the court.

Democrats are casting the race for control of the Wisconsin Supreme Court as a referendum on billionaire Elon Musk as he and other Republican allies have outpaced Democrats in spending with the election just a month away.

His unusual governing arrangement with President Trump is opening Republicans up to being yoked politically to Mr. Musk, who polls show is broadly unpopular.

A Republican congressman spoke out Monday against SpaceX CEO Elon Musk after the world's richest man called Democratic Senator Mark Kelly—who's also a Navy veteran—a "traitor" following Kelly's visit to Ukraine.