Joe and Hunter Biden are contradicting each other about the extent of the former vice president’s knowledge regarding his son’s business dealings in Ukraine. Biden senior told reporters in Iowa this weekend Saturday that he never discussed his son’s position on the board of directors of Burisma Holdings, a Ukrainian oil and natural gas company. Hunter Biden however, admitted during a series of interviews last spring he in fact had talked to his Dad about his foreign business interests on at least one occasion. Is the Ukraine the end of Biden's presidential run?