Bloomberg BNA breaking news report: “The challenge to federal disclosure rules was filed Sept. 2 in federal district court in Washington, D.C. Independence Institute v. Federal Election Commission, D. D.C., Civil No. 14-1500, 9/2/14 ). The state disclosure challenge was filed in federal district court in Denver Independence Institute v. Gessler, D. Colo., Civil No. 14-2426 9/2/14 ).”

UPDATE: See the CCP press release and backgrounder.