On March 1, the Colorado Republican party prepared for 60,000 voters to arrive at nearly 3,000 precinct-caucus sites across the state. Those voters would select men and women to attend the party’s county assemblies and congressional district conventions, in the first step of a multi-part process that determined 34 of Colorado’s 37 delegates to the Republican National Convention in Cleveland. To hear Donald Trump and his fans tell it, those tens of thousands of Republicans never arrived, never made their choices, and never had the chance to play a role in selecting the party’s delegates. Matt Drudge, the populist Right’s...