washington u.s. senate panel issue subpoena force paul manafort former campaign manager president donald trump appear hear wednesday part probe russia role 2016 presidential election republican chairman senate judiciary committee charles grassley top democrat panel dianne feinstein say subpoena issue late monday manafort agree interview will accommodate mr. manafort request cooperate committee investigation without appear wednesday hear unable reach agreement voluntary transcribe interview judiciary committee say statement tuesday say manafort will provide single transcribe interview congress would available judiciary committee well panel witness may will excuse wednesday hear would will agree production document transcribe interview say panel leaders also say manafort interview would constitute waiver right committee could require testify future early nbc news report manafort would speak senate investigators within 48 hours cite source close manafort say likely question june 2016 meet new york russian lawyer trump eldest son donald trump jr release email show welcome prospect receive damage information meet democratic rival hillary clinton senate panel one several congressional committees investigate allege russian efforts tilt election republican candidate favor possible collusion trump campaign moscow deny efforts trump deny campaign collude senate committee issue subpoena manafort statement