Yesterday, Donald Trump won his biggest victory yet, a decisive triumph in Florida’s winner-take-all primary. With the win, the tycoon’s hostile takeover of the Republican Party becomes overwhelmingly likely. Where was Jeb Bush during the battle for his home state’s primary? He was pouting. Spinning Bush’s failure to endorse his one-time protege Marco Rubio (whom he once touted for the vice presidency), or another non-Trump candidate, the former governor’s confidante Al Cardenas said: [Bush] put his heart and soul in this race, and the outcome was disappointing to him. You get emotionally drained, and you just want to stay off...