Celeb power good or bad for Obama?
Sean Penn will be around, at a rally organized by Ralph Nader. On one hand, says consultant Chris Lehane, who once worked for Al Gore, the celebrity factor can be a huge asset, especially with young voters, as it was for Bill Clinton. On the other hand it can backfire -- John Kerry hardly benefited when, at a pre-convention fundraiser, Whoopi Goldberg used sexually explicit references to refer to President Bush. File photo
