https://www.opensecrets.org/lobby/to...&showYear=2014
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US Chamber of Commerce $25,385,000 National Assn of Realtors $7,147,853 American Medical Assn $6,545,000 United Technologies $5,858,000 Blue Cross/Blue Shield $5,336,500 National Assn of Broadcasters $5,280,000 Dow Chemical $5,150,000 Pharmaceutical Rsrch & Mfrs of America $4,680,000 American Hospital Assn $4,677,318 Business Roundtable $4,230,000 National Cable & Telecommunications Assn $4,140,000 Google Inc $4,050,000 Boeing Co $3,760,000 AT&T Inc $3,670,000 Verizon Communications $3,640,000 General Electric $3,630,000 Northrop Grumman $3,566,960 Southern Co $3,540,000 Lockheed Martin $3,393,310 Pfizer Inc $3,290,000