A surging Sen. Elizabeth Warren is challenging Joe Biden’s dominance in the race for the Democratic nomination, standing at 22% to the former vice president’s 20% in a new CNN/Des Moines Register/Mediacom poll of likely Iowa caucusgoers.
Although neither candidate holds a clear lead at this point, the new poll finds Warren and Biden well ahead of other contenders for the Democratic nomination. CONT.
Jennifer Agiesta, CNN
