washington top u.s. intelligence official say thursday even resolute belief russia stag cyber attack democrats 2016 election campaign rebuke persistent skepticism republican president-elect donald trump whether moscow involve jam clapper director national intelligence say high level confidence russia hack democratic party campaign staff email disseminate propaganda fake news aim nov. election assessment even resolute oct. government first publicly accuse russia clapper tell hear senate arm service committee say motives attack would make public next week trump thursday morning call big fan intelligence agencies cast doubt assessments russia target campaign opponent former secretary state hillary clinton draw ire fellow republicans well democrats wary moscow distrust trump praise russian president vladimir putin intelligence officials thursday hear say worry lack support atop government could prompt value staff members leave agencies difference healthy skepticism ... disparagement clapper say vice president-elect mike pence use expression healthy skepticism defend trump criticism intelligence find central intelligence agency director john brennan speak university chicago institute politics thursday say trump never serve government unfamiliar intelligence profession bother someone go skeptical challenge work maybe disagree view expect president unite state recognize cia intelligence community establish statute important reason congressional hear oversee republican senator john mccain vociferous russia critic first promise series brief hear allegations russia try disrupt influence u.s. campaign one bitter recent history moscow deny allegations mccain tell reporters senator lindsey graham also vocal critic moscow would chair new arm service subcommittee dedicate cyber issue trump brief intelligence agency chiefs friday hack president barack obama receive report matter thursday unclassified version make public early next week think ever encounter aggressive direct campaign interfere election process see case say clapper leave trump become president jan. 20. clapper stop short declare russia action act war say determination beyond scope office clapper two officials testify national security agency director admiral mike rogers marcel lettre undersecretary defense intelligence say make u.s. intelligence confident russia behind cyber attack conclusion also reach several private firm obama last week order expulsion 35 suspect russian spy impose sanction two russian intelligence agencies say involve hack u.s. political group democratic national committee cia identify russian officials feed material hack dnc democratic party leaders wikileaks putin direction third party accord new u.s. intelligence report senior u.s. officials say document steal dnc clinton campaign chairman john podesta post internet election embarrass campaign tweet wednesday trump skeptical russian role affair write wikileaks founder julian assange say 14 year old could hack podesta dnc careless also say russians give info thursday trump say another twitter post intelligence agencies agreement assange media lie make look like intelligence fact big fan trump tweet clapper say assange put american live danger deserve credibility mccain lawmakers also blast assange senator claire mccaskill democrat say would howl republicans democrat describe intelligence officials trump u.s. intelligence officials say russian cyber attack specifically aim help trump beat clinton several republicans acknowledge russian hack link effort help trump win trump top advisers believe democrats try delegitimize victory accuse russia help senator tim kaine arm service member clinton vice presidential run mate say hope congress will stand bipartisan way integrity electoral process graham say obama action moscow fell short think obama throw pebble ready throw rock graham say putin good good stop u.s. spy chief 'resolute russia cyber attack differ trump