washington head congressional committee investigate contact donald trump campaign russia say monday panel see evidence inappropriate communications prompt panel top democrat insist early make determination devin nunes republican chairman house permanent select committee intelligence also say need special prosecutor dismiss suggestion trump release tax return clear allegations business tie russia go appoint special prosecutor exactly ask reporters nunes member trump presidential transition team say u.s. intelligence officials yet present committee evidence contact trump campaign staff russian intelligence look evidence anything nunes tell news conference call weekend report washington post trump administration ask senate intelligence committee chairman richard burr call journalists knock report possible collusion story fuel concern whether congressional committees lead trump fellow republicans would conduct serious investigation politically charge allegations nunes acknowledge white house give reporter number say administration ask knock report say communications news organizations intend promote transparency underscore partisan divide representative adam schiff intelligence committee top democrat tell news conference late monday non-partisan investigation would effective insist early comment evidence begin investigation begin state believe conclusion say house democratic leader nancy pelosi say nunes remark raise serious question stonewall potential contact trump presidential campaign russia possible russian attempt influence 2016 election trump behalf prompt democrats demand select committee special prosecutor trump fellow republicans congress resist suggestions prompt democrats contrast approach multiple investigations 2016 democratic presidential candidate hillary clinton include use private email server republican representative darrell issa break party line call independent review want trump administration successful start embrace high standards openness transparency say statement schiff say confident jam comey director federal bureau investigation would provide investigators information would need comey republican draw furious criticism democrats say election look email relate clinton use private server nunes say want u.s. citizens haul congress news report potential tie russia mccarthyism back place say allude notorious 1950s senate hear americans potential tie communism congress trump russia probe take partisan turn