The Donald is complaining about the results of the Republican convention in Colorado, where the delegates to the national convention are chosen. Ted Cruz won pretty much all of them, because Team Trump wasn't paying attention to the rules. The "shock" headline from Drudge, that's at the top of the page? It refers to an article from the Denver Post concerning the decision of the Republican Party in Colorado to forgo a presidential vote at the caucus level. Note the date it was first published:
Breaking news from last summer
In other words, Team Trump should have known about the rules in Colorado a long time ago. They also should have made arrangements to have their people attend the caucuses in February. Ted Cruz was paying attention and did what he needed to do to win the delegate elections. Trump didn't. That is the story here. And it tells you a lot about the relative strengths of the two campaigns in question. You have to get your people in place to win. And you have to understand what it takes to win. Ted Cruz appears to understand. He may not win, but he's doing everything he can to put himself in position to win. If Trump can't handle that part of the job, he's not going to be president.