My January 24 column on the role of the AFL-CIO in the Citizens United v. FEC case highlighted the concerns of some unions regarding the federation's decision to file an amicus brief in support of Citizens United in its case against the Federal Elections Commission. The piece stirred a tremendous response and a great discussion about the Supreme Court's removal of limits on corporate campaign spending. In preparing the piece and since its publication, I've heard from heads of national unions that are affiliated with the AFL as well as leaders of state and regional labor federations and lots of individual union members. Today, I'll highlight a very critical response from a top lawyer for the AFL-CIO.