President Donald Trump, speaking alongside cryptocurrency leaders at the White House this week, made a statement that Republican and Democratic candidates alike wouldn’t touch with a 10-foot pole. “If I were the mayor of a town or the governor of a state, and I had a chance to get a big plant in, an AI plant or a data center,” Trump said, “I would absolutely want it because the jobs are enormous and the money paid, the taxes paid, are just enormous.” It’s not the kind of message anyone is using in competitive midterm races. The race to build data centers,...