Vice President Joe Biden opened the door to a potential presidential primary challenge to Hillary Clinton . `` There is a chance '' and I think it's very unlikely that she would be able to win in Iowa or New Hampshire without being attacked by Biden. Biden says he has until the summer to decide , and sees the field as `` wide open ''
Vice President Joe Biden opened the door to a potential presidential primary challenge to Hillary Clinton . `` There is a chance '' he 'll challenge her for the Democratic nomination , he said . Biden says he has until the summer to decide , and sees the field as `` wide open ''