Oops! Aetna discloses political donations

 Insurance giant Aetna inadvertently disclosed more than $7 million in donations to conservative political groups in a regulatory filing made earlier this year, according to a Washington-based advocacy group.

Documents obtained and distributed by Citizens for Responsibility and Ethics in Washington show that Aetna made a $3 million donation to the American Action Network and a $4.05 million donation to the U.S. Chamber of Commerce in 2011.

The regulatory filing puts the insurance company in the unusual position of having voluntarily disclosed donations to groups that are attractive for the very reason that they do not reveal the source of their donations.

"I think Aetna screwed up. I don't think they needed to disclose this," said Melanie Sloan, the executive director of CREW, an advocacy group that opposes corporate political spending.