7 of 10
7. Olympia Snowe and Susan Collins
Olympia Snowe and Susan Collins
Last year's rank: 7

Amid near-uniform Republican opposition in the Senate, the two Maine Senators' willingness to cut deals has allowed Democrats to claim victory on everything from Wall Street reform to extensions of unemployment benefits. Bottom line: Their votes will matter.

NEXT: Valerie Jarrett

Last updated September 29 2010: 11:28 AM ET
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