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 . `` I think this is wide open on both sides , '' he said of the presidential primaries . Biden says he has until the convention to decide , and sees the door 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 convention to decide , and sees the door as ` ` wide open ''