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...