washington president donald trump eldest son ask house representatives committee tuesday investigate possible leak information dec. interview lawmakers congressional probe russia 2016 election pick steam ahead new year alan futerfas attorney donald trump jr. ask representative michael conaway republican lead house intelligence committee investigation allege russian meddle election look comment say come committee members staff include media report maintain credibility investigation committee determine whether member staff member violate rule say letter conaway spokeswoman conaway decline comment separately associate press report trump jr. due appear congress wednesday time senate intelligence committee cite source familiar matter republican senator richard burr committee chairman would confirm report committee members aid decline comment futerfas also decline comment senate house intelligence panel conduct main congressional investigations u.s. intelligence agencies find moscow attempt influence campaign help republican trump defeat democratic opponent hillary clinton also work determine whether trump associate collude russia moscow deny seek influence election trump dismiss talk collusion two committees sometimes members sometimes staff conduct frequent interview variety witness seek wrap investigations well u.s. congressional elections november 2018. burr say felt urgency relate election security relate next year vote say expect senate committee investigation would last 2018 dozens people still interview go carry next year go carry far unless basket people interview change way change learn individuals know today burr tell reporters u.s. capitol say committee plan public hear russia probe separately sam clovis former trump campaign official interview house intelligence committee four hours tuesday come attention investigators report encourage george papadopoulos one-time trump foreign policy campaign adviser improve relations unite state russia clovis attorney deny report respond immediately request comment house testimony tuesday donald trump jr. want 'leak probe congress russia probe press