 Another part of the platform stated, "responsibility for ending the tragic prospect of war is a joint responsibility of the Soviet Union and the United States".During the convention, Wallace faced questioning regarding letters he had written to guru Nicholas Roerich; his refusal to comment on the letters was widely criticized.Wallace was further damaged days after the convention when Whittaker Chambers and Elizabeth Bentley testified before the House Unamerican Activities Committee that several government officials associated with Wallace (including Alger Hiss and John Abt) were Communist infiltrators.