washington former trump campaign adviser carter page thursday deliver subpoena document describe irrelevant unnecessary two congressional committees investigate allege russian interference 2016 presidential election page oil industry consultant numerous contact russia tell reuters text message deliver document senate house intelligence committees drop irrelevant unnecessary document witch hunt page say text big good things now page deliver document two weeks acknowledge appearance house panel provide relevant document seek subpoena include email another former trump campaign foreign policy adviser george papadopoulos include accord transcript testimony release last week page say turn email assume committee likely would receive others already agree submit subsequent question page first cite fifth amendment right self-incrimination reason withhold document relevant committee subpoena say nothing would directly incriminate add concern discrepancies document withhold materials collect government eavesdrop operation secret foreign intelligence surveillance act warrant papadopoulos plead guilty last month charge lie fbi efforts arrange meet 2016 campaign then-republican candidate donald trump russian president vladimir putin papadopolous also agree cooperate investigation lead special counsel robert mueller possible collusion trump campaign moscow russia deny interfere 2016 campaign trump deny collusion campaign u.s. intelligence agencies charge russian influence operation intend sway vote trump democratic challenger hillary clinton former trump campaign adviser deliver 'irrelevant document congressional committees