One third of the $15 trillion of mortgages in existence in 2008 are owned, or securitized by Fannie Mae, Freddie Mac, Ginnie Mae, the Federal Housing and the Veterans Administration. Wall Street buyers of repackaged loans didn't mind buying risky paper because they assumed that they would be guaranteed by the federal government: read bailout from the taxpayers. Today's housing mess can be laid directly at the feet of Congress and the White House.