The Democrats have the “fascist” business wrong. Donald Trump isn’t a fascist, or even a semi-fascist, in President Biden’s term. Mr. Trump is an opportunist. His ideology is coextensive with his temperament: In both, he is an anarcho-narcissist. He is Elmer Gantry, or the Music Man, if Harold Hill had been trained in the black arts by Roy Cohn. He is what you might get by crossing the Wizard of Oz with Willie Sutton, who explained that he robbed banks because “that’s where the money is.” As for Mr. Trump’s followers, they belong to the Church of American Nostalgia. They...