washington u.s. senate judiciary committee chairman chuck grassley say wednesday intend call former paul manafort former campaign manager president donald trump 2016 presidential bid testify panel iowa newspaper report grassley iowa republican say manafort would subpoena necessary could question anything include presence june 2016 meet new york involve president son donald trump jr. russian lawyer des moines register say work close already agree go bring manafort committee paper quote grassley say call reporters describe cooperation senator dianne feinstein rank democrat committee u.s. senate judiciary chairman call ex-trump aide manafort testify