Age: 46
Occupation: Former governor of Alaska
Previous TIME 100 Appearances: 1
The former Republican vice-presidential candidate resigned her position as Alaska's governor to pursue public speaking, book writing and a career as a Fox News pundit, but she remains a leading voice in the party and a potential contender for the 2012 nomination for President. Her trademark antigovernment stance has meshed effectively with the burgeoning Tea Party movement, even as traditional GOP players continue to view her as an unreliable standard bearer.