A federal appeals court has blocked a Minnesota law that requires corporations to disclose the money they spend on political campaigns. The measure forces companies to set up and keep track of a political fund if they spend more than $100 a year on political speech. But on Wednesday, the 8th U.S. Circuit Court of Appeals in St. Louis ruled in a 6-to-5 decision that the law likely violates the Supreme Court’s Citizens United ruling allowing unlimited spending to influence elections.