washington white house launch internal investigation use private email senior aid pull batch email white house server private account politico report thursday cite four unnamed officials politico say effort begin week report president donald trump son-in-law adviser jar kushner senior white house officials use private email account exchange message government business u.s. house representatives committee ask white house monday information politico report white house spokeswoman sarah sanders ask trump concern report use private email tell reporters early thursday white house clear instruct staff fully comply presidential record act staff brief need preserve record continue so trump 2016 election campaign republican real estate developer attack democratic rival hillary clinton use private email server official correspondence secretary state president barack obama clinton message late determine contain classify information white house probe could take several weeks even months complete officials search email send receive government business politico report white house counsel office review account determine message germane investigations ongoing russia probe congress special counsel robert mueller politico report mueller investigate allege russian interference 2016 u.s. election possible collusion trump associate russia deny efforts trump dismiss talk collusion politico early report senior trump aid also use private email account include former chief staff reince priebus former chief strategist steve bannon economic adviser gary cohn new york time report monday private account also use president daughter ivanka trump become white house adviser stephen miller senior trump adviser white house start probe private email use senior aid politico