Six years after Mike Braun came out on top in Indiana's first Trumpian Idol contest and won election to the U.S. Senate, he has coasted to the Republican nomination for governor. It shouldn't have been quite so easy. On paper, Braun faced one of the most competitive statewide fields in Indiana history. At least three Republican contenders — Lt. Gov. Suzanne Crouch, Brad Chambers and Eric Doden — had plausible cases to make for being stronger candidates than Braun. Braun is an uninspiring U.S. senator who ran an uninspiring gubernatorial campaign. That turned out to be good enough because Braun...