washington u.s. senator susan collins republican member intelligence committee say democrats call testify report party hillary clinton presidential campaign pay part dossier detail accusations president donald trump tie russia washington post report last week marc elias lawyer 2016 democratic presidential candidate clinton use campaign fund hire fusion gps firm behind dossier committees chamber congress investigate origin content document john podesta clinton campaign chairman u.s. representative debbie wasserman schultz head democratic national committee time well elias absolutely need recall testify collins say appearance cbs face nation difficult imagine campaign chairman head dnc would know expenditure magnitude significance collins say perhaps something go certainly worth additional question two witness lawyer absolutely anyone widely report supporters republican jeb bush primary opponent trump initially pay firm research perkins coie elias law firm confirm tuesday hire fusion gps april 2016. washington free beacon conservative online publication back billionaire republican megadonor paul singer say friday original funder fusion gps project compile opposition research multiple republican presidential candidates include trump know steele dossier compile former mi6 officer christopher steele document identify russian businessmen others u.s. intelligence analysts conclude russian intelligence officer work behalf russian government representative trey gowdy republican run house oversight committee say appearance fox news sunday interest whether federal bureau investigation department justice use dossier conduct probe expect democratic national committee objective gowdy say almost definition opposition research objective next thing house intel try find whether u.s. government rely it republican senator want democrats testify trump dossier