It marks the first time in her life that Oprah is breaking tradition and endorsing a candidate for president. But will support from Oprah improve Barack's chances?
Star support in politics isn't all that it seems -- remember Al Gore? Just about every star in Hollywood backed Al -- and all it got him was an Oscar, a Nobel Peace Prize and a role on "30 Rock" -- but no work in the Oval Office.
Should Barack tell Oprah "Thanks, but no thanks!" or should he be as thrilled as one of her "Favorite Things" audience members?