He’s Attacking Big Ag. He’s Running in Nebraska. Somehow It’s Working.

Outside the BigIron Events Center at the State Fairgrounds in Grand Island, Nebraska, the midway blinked with lights and rippled with the faint shrill screams of happy children. At the JBS Show Barn—named for the largest meatpacking company in the world—farm kids unloaded sheep from trailers into straw-lined metal pens to be shown for ribbons. Inside the…