The tentacles of Fannie Mae extend to the carbon credit scam. The Washington Examiner's Barbara Hollingsworth unveils more hijinks at Fannie Mae

When he wasn't busy helping create a $127 billion mess for taxpayers to clean up, former Fannie Mae Chief Executive Officer Franklin Raines, two of his top underlings and select individuals in the "green" movement were inventing a patented system to trade residential carbon credits.

Patent No. 6904336 was approved by the U.S. Patent and Trade Office on Nov. 7, 2006 -- the day after Democrats took control of Congress. Former Sen. John Sununu, R-N.H., criticized the award at the time, pointing out that it had "nothing to do with Fannie Mae's charter, nothing to do with making mortgages more affordable."

It wasn't about mortgages. It was about greenbacks. The patent, which Fannie Mae confirmed it still owns with Cantor Fitzgerald subsidiary CO2e.com, gives the mortgage giant a lock on the fledgling carbon trading market, thus also giving it a major financial stake in the success of cap-and-trade legislation.