Florida Gov. Ron DeSantis on Tuesday completed the full-scale reboot of his once-promising presidential campaign, reassigning his campaign manager and elevating a loyal hand from his governor's office. The news comes just weeks before the GOP field will face off in the first presidential primary debate in Milwaukee, a chance to reverse a summer that has seen DeSantis, Trump's best-positioned challenger, slip dangerously far behind former President Donald Trump in national polling. Like every reset — DeSantis insists it's a "reload" — the real question remains on if DeSantis waited too long to execute the retooling. Past presidential cycles are...