sen. elizabeth warren d-mass object serious concern white house due potential 2020 presidential challenger despite fact say run.the white house team republican national committee rnc dig whatever warren whatever fabricate circulate condemn memos reporters.meanwhile aid white house keep tabs warren criticism trump use media aggressively hit back last month hill publish senator criticism america large non-nuclear bomb drop afghanistan white house quickly scramble rebuttal unusually high level concern one senator somebody probably hearts mind liberal activists leader party voice carry weight respond say white house official wish remain anonymous.in effort put senator trump bring back favorite offensive warren insult last month refer pocahontas deliver speech national rifle associate feel next election go swamp candidates say trump may pocahontas remember many see warren likely 2020 presidential candidate trump find legitimate fault adversaries cowardly resort racial insult attempt make look bad warren abstain engage name call despite trump administration say elizabeth warren perfect foil trump administration say former trump aide sam nunberg always think would new rosie donnell base hat think joke somebody galvanize us smart president bring nra white house claim focus govern believe also need brand massachusetts senator touch unfit presidency hold 56 percent approval rat nationwide recent survey morning consult.it seem white house good hide fact seriously afraid warren momentum potential reach blue-collar voters back trump luckily trump racist name call make look bad her.photo alex wong/getty image fear defeat elizabeth warren 2020 trump freak