We are all owed a better explanation from the FBI and Secret Service about the attempted assassination of Donald Trump 16 months ago at a campaign rally in Butler, Pa. The president himself remains unsatisfied with the answers he’s been given about the circumstances leading to 20-year-old Thomas Crooks climbing on a rooftop with an AR-15 style rifle and firing eight times at Trump, narrowly missing his head but hitting his ear. Crooks was shot dead by a Secret Service sniper, but not before he killed rallygoer Corey Comperatore, 50, and seriously wounded David Dutch, 58, and James Copenhaver, 75,...