Oprah vs. Clinton?

The feud on the campaign trail is over for Barack Obama and Hillary Clinton. The formal Prez rivals have been playing nice -- but are their big supporters Oprah and Bill harboring animosity? At Nelson Mandela's London birthday bash, ex-president Clinton and Winfrey -- a staunch Obama supporter -- reportedly gave each other the cold shoulder, reports the NY Post . "There was a very cold reception between them," said a source. Insiders at the party revealed that while Bill and the talk show ... [link]