The first time I interviewed Donald Trump, back in 1987, he said this: “When I go up to New Hampshire -- I'm not running for president, by the way -- I get the best crowd, the best of everything in terms of reception. “The politicians go up and get a moderate audience. I go up, and they're scalping tickets. You heard that? They're scalping tickets. Why? Because people don't want to be ripped off, and this country is being ripped off. I think if I ran, I'd win.” He has been honing this act for a long time. Many pundits—some...