Billionaires across the political spectrum pour money into a race that is poised to be the most expensive judicial contest in U.S. history.

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.

A group backed by billionaire Elon Musk is behind a new set of deceptive attack ads and text messages targeting voters just weeks ahead of the election for a seat on Wisconsin’s Supreme Court.