NPR: Who Paid For This Political Ad? An 81-Year-Old Law Could Force The Answer

Three groups advocating for better disclosure – the Campaign Legal Center, Common Cause and the Sunlight Foundation – are invoking the law against 18 TV stations in legal complaints at the Federal Communications Commission, itself a creation of the 1934 act.

Secret money political groups have proliferated on TV since the Supreme Court's Citizens United ruling in 2010, triggering a steady stream of similar letters and petitions to the FCC from the Campaign Legal Center, Common Cause and the Sunlight Foundation and other pro-disclosure groups.

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