Sara Millan (left) thanks Neighborhood Assistance Corporation of America CEO Bruce Marks after NACA was able to reduce her family's mortgage during an event in Los Angeles in September 2010.
Many experts say reducing mortgage principal can help troubled homeowners avoid foreclosure and stay in their homes. But the regulator who oversees two of the nation's largest mortgage holders, Fannie Mae and Freddie Mac, has rejected the idea.
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Created by the federal government during the Great Depression, Fannie Mae became a Washington powerhouse: a highly profitable, private company, protected by the government and boasting huge lobbying clout. But today, Fannie Mae has essentially become a ward of the state.
Manuel Balce Ceneta/AP