Chairman2006 rank: 8
Having made stars of the likes of Rachael Ray and Dr. Phil, Winfrey is now trying to use her clout to move the political needle: She was an early supporter of Democrat Barack Obama's bid for the presidency. Politics may be Winfrey's Rubicon; Obama has been faltering. Still, Winfrey's cultural clout is undeniable. Her Oscar special this year was among the top-rated shows that week, and in a tough year for magazines, O: The Oprah Magazine saw ad pages rise 14%.