Numbers of public sector unions in Wisconsin collapsed in the wake of an historic vote that ended on Thursday. The unions are acutely feeling the impact of Act 10, Governor Scott Walker’s controversy-generating collective bargaining reforms of 2011. The reforms require public sector unions to hold annual recertification votes. In order to be certified as unions by the state, the labor groups must get the approval of over 50% of their members. For several weeks now the Wisconsin Employment Relations Commission has been holding an open and ongoing vote for over 400 unions, mostly made up of public school teachers...