Following the Kennedy Assassination on November 22, 1963 and the subsequent swearing in of Lyndon Johnson as President of the United States, Feldman was retained in the cabinet as a general advisor. He also renewed his role gathering intelligence on his President's political rival – in this case Senator Barry M. Goldwater, Feldman would encourage reporters who were hostile to Goldwater to follow and harangue him. In 1965, Feldman retired from government administration.