By Nedra Pickler; Brendan Riley, Associated Press WASHINGTON -- The rival presidential campaigns of Hillary Rodham Clinton and Barack Obama traded accusations of nasty politics Wednesday over Hollywood donor David Geffen, who once backed Bill Clinton but now supports his wife's top rival.

The rival presidential campaigns of Hillary Rodham Clinton and Barack Obama traded accusations of nasty politics Wednesday over Hollywood donor David Geffen, who once backed Bill Clinton but now supports his wife's top rival.