Lobbying Top Spenders (1998-2009)US Chamber of Commerce $606,758,180
American Medical Assn $220,832,500
General Electric $196,410,000
AARP $175,702,064
American Hospital Assn $174,890,431
Pharmaceutical Rsrch & Mfrs of America $173,403,920
AT&T Inc $150,471,757
Northrop Grumman $143,005,253
Exxon Mobil $138,886,942
National Assn of Realtors $138,417,380
Blue Cross/Blue Shield $136,317,077
Business Roundtable $134,030,000
Edison Electric Institute $133,995,999
Verizon Communications $132,534,841
Lockheed Martin $122,340,423
Boeing Co $121,528,310
General Motors $106,914,483
Southern Co $104,620,694
Freddie Mac $96,194,048
Altria Group $93,650,000
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source: www.opensecrets.org