Occupation: Governor of California
Previous TIME 100 Appearances: 2
The former Mr. Universe took on California and made it clear he wouldn't be strong-armed by his own party on issues like global warming. Term limits bar the Republican governator from re-election this year, though his approval ratings at a record low in March, as his state continues to be plagued by fiscal woes might have served the same purpose. Still, as the leader of the union's most populous state, he's a force to be reckoned with.