Florida Gov. Ron DeSantis had only moments earlier departed a Saturday celebration marking his completion of a 99-county tour of Iowa – a feat he has hyped for months Never Back Down, the super PAC supporting the Republican’s White House bid, abruptly let go three key senior staffers that evening, including an interim CEO who had just been installed nine days earlier. The sudden departures sent shockwaves throughout DeSantis’ political operation, from Tallahassee to Des Moines. The next day, he presented himself as a focused and disciplined candidate, never mentioning the behind-the-scenes political strife. In a statement to CNN, deputy...