washington president donald trump old son donald trump jr. testify privately senate judiciary committee thursday investigate allegations russian interference 2016 u.s. election trump jr. invite testify public hear july reach agreement speak privately committee staff look forward professional productive meet appreciate opportunity assist committee alan futerfas lawyer trump jr. say statement wednesday russia loom large first seven months trump presidency u.s. intelligence agencies conclude russia work tilt last year presidential election favor trump republican candidate special counsel robert mueller lead investigation examine potential collusion russia trump campaign several congressional committees also look matter senate house intelligence committees conduct main congressional investigations trump jr. expect testify senate intelligence sometime late year interest talk principal witness talk everybody else room senator richard burr panel republican chairman tell reporters congressional investigators focus june 2016 meet trump tower whose attendees include russian lawyer lobbyist trump associate include son come anything term relationship russians trump campaign trump business interest separately susan rice national security adviser former president barack obama testify tuesday house intelligence committee four hours erin pelton spokeswoman rice say meet voluntarily committee part investigation ambassador rice remain fully supportive bipartisan efforts determine extent scope russia outrageous efforts interfere 2016 election say statement rice subpoena committee look republican concern whether anyone administration obama democrat ask unmask name trump campaign advisers pick top-secret foreign communications intercept several u.s. officials tell reuters request obama administration officials properly scrutinize appropriate moscow deny meddle trump deny collusion campaign trump jr. testify privately senate committee thursday