Today a D.C. federal appeals court temporarily reinstated a Federal Election Commission rule concerning when advocacy groups and others must disclose their donors, but has directed the FEC to clarify the rule or return to the courts for more litigation. The effect of the ruling is to put in limbo a key disclosure rule less

Outside groups have become a potent political force in the 2012 election campaign. Unleashed by the Supreme Court ruling in the Citizens United case and subsequent lower court rulings, such groups can raise unlimited sums from individuals and corporations for ads and other spending that is not “coordinated” with a candidate. The most dramatic example: