washington u.s. house intelligence committee issue subpoena justice department fbi document relate dossier allege russia collect compromise material donald trump panel top democrat say tuesday representative adam schiff tell msnbc interview democrats committee object subpoena say republicans issue attempt discredit author former british intelligence officer christopher steele republicans say important understand genesis dossier whether create sabotage trump successful campaign president dossier fund group conduct political opposition research trump 2016 campaign include wide-ranging allegations trump associate finance house intelligence panel conduct one several congressional probe allege russian interference 2016 u.s. election include potential collusion trump campaign moscow russia deny meddle election trump deny collusion u.s. house panel issue subpoena justice department trump dossier democrat