Donald Trump is right: The system is rigged. It’s rigged in favor of front-runners. That’s why Trump, who is leading the Republican nominating contest, has a larger percentage of delegates (46 percent) than of votes (37 percent). Unsurprisingly, Trump never mentions when the rules have helped him. He much prefers to whine and peddle conspiracy theories when they don’t. Trump’s latest tantrum is over Colorado, where Ted Cruz just swept all 34 of the state’s available delegates. Trump is calling the results “totally unfair” and on Twitter he asked: “How is it possible that the people of the great State...