Why the goofy, patrician candidate is finally hitting his stride. George W. Bush never really suffered for his sins. But his kid brother sure has. The demise of Jeb Bush has been a source of immeasurable pleasure for, well, nearly everyone. His campaign is a nine-figure boondoggle that suckered cronies from Greenwich and Dallas into investing in a can't-miss-opportunity. That grating WASP aura of entitlement he wore melted nearly instantly with a choice piece of hectoring about his paucity of energy. Pundits took so much pleasure in Jeb Bush's plummet that they couldn't imagine it could ever be reversed. With...