Donald Trump’s organizational problems have gone from bad to worse to flat-out embarrassing. Here’s Politico with the play-by-play from this weekend’s Colorado GOP convention, the latest scene of Trump’s delegate-securing failure: Trump’s last-minute organizing effort did not go well. The leaflet his campaign handed out listed a slate of 26 delegates. But in many cases the numbers indicating their ballot position — more than 600 delegates [were] running for 13 slots — were off, meaning that Trump’s team was mistakenly directing votes toward other candidates’ delegates. When the balloting results were announced Saturday evening, [Ted] Cruz picked up the 13...