Perry Capital, which seeks to represent investment funds in the litigation, said it wants to stop the U.S. Treasury from enforcing a so-called third amendment to preferred stock purchase agreements, according to papers filed yesterday in federal court in Washington, according to Bloomberg.

Perry Capital and hedge funds including Paulson & Co. have been lobbying Congress to consider allowing Fannie Mae and Freddie Mac to become independent again. Republican and Democratic lawmakers, and President Barack Obama, have called for both mortgage finance companies to be liquidated, with the U.S. Treasury forecasting to collect more than $200 billion of profit from the agencies over the next decade.