As Scott Van Voorhis notes at Contrarian Boston, Gov. Maura Healey, Lt. Gov. Kim Driscoll, state Attorney General Andrea Campbell and others have belatedly come out against the anti-MCAS ballot question that’s heavily backed by the Mass. Teachers Association. … It’s almost as if the leaders’ too-little-too-late action was deliberate, allowing them to say they did the right thing and yet not angering the MTA too much. The public union is a big player in the state Democratic party after all.