Damn. It turns out school committee candidates backed by local affiliates of the Massachusetts Teachers Association did much better in last week’s elections than previously thought, as Contrarian Boston’s Scott Van Voorhis reports. Sure, MTA-backed candidates in Newton got their clocks cleaned last Tuesday. But school committee candidates backed by a teachers’ union nabbed seats in Watertown, Cambridge, Beverly, Quincy, Waltham, and Gloucester, according to Scott. … Think about it: a union whose members’ revenues come 100 percent from taxpayers now have their favored candidates sitting on boards deciding how to spend taxpayer money. … And let’s not get into what this means for the radical curriculum agenda of the MTA.