Real estate agents, homebuilders, Wall Street banks, community banks, and civil rights groups have been lobbying Congress to maintain various federal subsidies on mortgages

American Bankers Assn.

Representing banks of all sizes, it spent more than $6.2 million on lobbying in 2010

Financial Services Roundtable

Lobbyists for banks and nonbank financial companies with $92.7 trillion in total assets, including Bank of America (BAC), General Electric (GE), and Wells Fargo (WFC)

National Association of Realtors

A trade group with 1.1 million members, its political action committee contributed $3.9 million during the 2010 midterm election cycle, more than any other PAC

National Association of Homebuilders

A Republican-leaning federation that helped House Financial Services Committee Chairman Spencer Bachus (R-Ala.) raise nearly $200,000 from the housing industry, the top donor to his 2010 reelection campaign

National Fair Housing Alliance

Steers a coalition of more than 20 civil-rights groups, including the NAACP, in an effort to preserve access to fair credit and homeownership

National Council of State Housing Agencies

These state government boards have more than $115 billion in bonds outstanding to aid first-time home buyers. They plan a lobbying campaign in March to highlight who benefits from low-cost mortgages

Data: Bloomberg, Center for Responsive Politics