"I'm going to put it very simply: the president of the United States has the authority to do what the president has the authority to do, which is very powerful. The president of the United States calls the shots," Trump said Monday evening, pressed on his claim during a news briefing at the White House. He continued: "When somebody’s the president of the U.S., the authority is total, and that’s the way it’s gotta be." But experts — and the Constitution — say Trump is wrong. The authority to require businesses to close in a public health crisis is what...