On April 13, ABC’s World News Tonight correspondent Tom Llamas devoted most of that night’s report to chilling death threats against the Colorado state Republican party chairman, angered at how Donald Trump failed to win any delegates at the weekend party convention. Besides that one report, and two minor mentions (one on ABC’s Good Morning America and on Thursday’s CBS Evening News), that’s all the broadcast news attention given to reports of actual death threats in this increasingly nasty presidential race: 110 seconds in total, not a moment of which was on NBC. But since the Colorado convention through Thursday...