His co-star asks, "What should we call the fans, coach?" McConaughey replies, "Cheeseheads, of course." The commercial cuts to a boardroom full of celebrities, including Martha and Charli XCX.

Cheeseheads stacked outside a breakfast meeting for Wisconsin Democratic delegates on Tuesday. (Katy Stech Ferek/WSJ) Ben Wikler, chair of the Democratic party in Wisconsin, had a message Tuesday ...