 In early 1949, Wallace testified before Congress in the hope of preventing the ratification of the North Atlantic Treaty, which established the NATO alliance between the United States, Canada, and several European countries.He became increasingly critical of the Soviet Union after 1948, and he resigned from the Progressive Party in August 1950 due to his support for the UN intervention in the Korean War.After leaving the Progressive Party, Wallace endured what biographers John Culver and John Hyde describe as a "long, slow decline into obscurity marked by a certain acceptance of his outcast status".