By most accounts, Ronna McDaniel is in a solid position to win her fourth term as chair of the Republican National Committee. But the race to head the RNC is by no means a lock—and it’s shaping up to be one of the dirtier, more acrimonious fights among a political party known for dirty and acrimonious fights.
In less than two weeks, the race to lead the RNC—the first contested competition for the position since 2011—has...