Biddle was ROOSEVELT’s Attorney General from September 1941 until 1945. As Solicitor General from 1939-40 he had been required to administer the Alien Registration Act of June 1940 with which he did not agree. He had to supervise the internment of Japanese and German Americans but he succeeded in removing Italian Americans from the list of aliens. As Attorney General he appointed an Interdepartmental Committee on Investigations which tried to set up procedures for loyalty investigations. After the war he served as a member of the International Military Tribunal at Nuremberg and was noted for his compassion.