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5. Elizabeth Warren
Elizabeth Warren
Special Adviser to the Secretary of the Treasury
Last year's rank: New

A liberal hero for her blunt critiques of Wall Street, she hatched the idea for a consumer financial protection agency, fought stiff industry opposition to including it as a central element of financial reform, and now is taking the lead in setting it up.

NEXT: Lisa Jackson

Last updated September 29 2010: 11:28 AM ET
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