Beyond that, anti-Trump Republicans treat his voters like immoral enablers of a malignant boob. Should Mr. Trump lose decisively in November they’ll lord it over everyone, say “I told you so,†and accept what they imagine will be forelock-tugging apologies. Then they will get to work burying not only Mr. Trump but his issues. That’s where the future of the GOP will be fought, and found: on whether Trumpism can be defeated along with Mr. Trump. Mr. Trump would care about that if he cared about that.