Voorhis also posed a direct legal threat to the Dulles brothers through his efforts to shine a light on the wartime collusion between Sullivan and Cromwell clients like Standard Oil and DuPont chemical company and Nazi cartels such as IG Farben. Voorhis further unnerved the Dulles circle by demanding a congressional investigation of the controversial Bank for International Settlements, charging that bank president Thomas McKittrick, a close associate of the Dulles brothers, was a Nazi collaborator.
