washington u.s. senator elizabeth warren thursday urge justice department top antitrust official recuse ongoing review inc plan 85.4 billion acquisition time warner inc. urge assistant attorney general antitrust makan delrahim confirm late last month take part review previous statement merger pose major antitrust problem refusal recuse undermine public confidence division ability reach unbiased final decision matter warren write letter warren concern deal base fact already own directv mean propose transaction would combine big pay tv provider major u.s. content provider time warner stable content include premium cable channel hbo tnt news channel cnn among others say last month plan reinvest advertise revenue content go head-to-head online stream service netflix inc. decline comment say hop complete transaction end year justice department immediately respond request comment u.s. justice dept official review t/time warner deal senator