Democrats on Tuesday promised to “punch back” against Elon Musk in the race for control of the Wisconsin Supreme Court, casting the election as a referendum on the billionaire adviser to President Donald Trump.

Wisconsin will hold a special election to replace a retiring liberal justice on the state Supreme Court. It’s set to be the most expensive state court race in U.S. history —breaking the record for a different Wisconsin Supreme Court seat in 2023,

The contest that will decide the political tilt of the swing state’s highest court is likely to be the most expensive state court race in U.S. history.