Kelly McParland: The NDP thinks they bought off the teachers, but the teachers don’t stay bought

Just a day or so into the Ontario election, New Democratic Party leader Andrea Horwath appeared at a lectern with a new friend, teachers’ union president Sam Hammond. They grasped hands. They pledged fealty. Horwath called it a “historic endorsement.”

Maybe. You could also view it as a risky venture, the kind that proves costly in the end.