The Power List: RACHEL MADDOW

TV Host/Political Commentator, 39

Maddow took the reins of MSNBC primetime after the departure of Keith Olbermann, headlining the channel's 25th consecutive monthly ratings victory in the 9 p.m. slot over CNN. She earned an Emmy for her coverage of Afghanistan this year, and, with the upcoming presidential election, she's poised to become ever more prominent.

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