In just three weeks, the first televised G.O.P. Presidential debate will mark the start of the 2024 campaign proper, plunging American politics further into uncharted waters. “It is most likely that, by the time we get on the debate stage on August 23rd, the front-runner will be out on bail in four different jurisdictions—Florida, Washington, Georgia, and New York,” Chris Christie, one of Donald Trump’s rivals in the Republican Presidential primary, remarked on CNN’s “State of the Union” on Sunday.Trump seems unlikely to appear at the debate in Minneapolis, but his presence will loom over every minute of it. Even allowing for how he has changed perceptions of American politics in the past eight years, and made the unprecedented seem routine, the current situation is extraordinary. On Thur...