Donald Trump seems to get indicted on a weekly basis. Yet he is utterly dominating his Republican rivals in the polls, and he is tied with Joe Biden in the general election surveys. Trump’s poll numbers are stronger against Biden now than at any time in 2020. What’s going on here? Why is this guy still politically viable, after all he’s done? We anti-Trumpers often tell a story to explain that. It was encapsulated in a quote the University of North Carolina political scientist Marc Hetherington gave to my colleague Thomas B. Edsall recently: “Republicans see a world changing around...