(For Tuesday M.E.) The state's two teachers unions have accomplished what their national organization could not: a merger. The Minnesota Education Association and the Minnesota Federation of Teachers officially become one today. The new organization is called "Education Minnesota." Union leaders say ending their competition over who'll represent which teachers means more time to focus on teaching students. But opponents say the merger is mainly a political move. Minnesota Public Radio's Tim Pugmire reports... (Sound) In the Education Building at the Minnesota Sta