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Majority PAC: Top donors*

1. Fred Eychaner, Newsweb Corp. - $4.3 million

2. James H. Simons, Renaissance Technologies LLC - $3 million

3. United Brotherhood of Carpenters - $2.35 million

4. American Federation of Teachers - $2 million

T5. American Federation of State, County and Municipal Employees - $1 million

T5. Franklin L. Haney, Franklin L. Haney Company, LLC - $1 million

T5. Laborers International Union of North America - $1 million

*Top donors for 2012 election cycle; numbers through Nov. 26, 2012.

Source: Center for Responsive Politics, Federal Election Commission