You have to at least give the Colorado Education Association (CEA) points for brazen candor. At its 97th Annual Delegate Assembly in April, the state’s largest teachers’ union voted to formally oppose capitalism as an economic system. The announcement came as little surprise to Coloradans who’ve watched as the union has veered so far to the left in recent years it’s now off the road entirely. What should set off alarm bells for everyone, however, is that CEA believes its militancy no longer has to be denied or defended. A former Denver Public Schools teacher took to Twitter on April...