USA. Monograph describing historical evolution and later trends of the Congress of Industrial Organisations (CIO) trade union federation, as related to its attitudes towards communism and relationships with the communist political party - covers membership, communist influence and union tactics internal and external factors (incl. International relations developments and US foreign policy), CIO's withdrawal from the WFTU, etc., and explores reasons for the absence of an American socialist or left-wing labour movement. Bibliography pp. 341 to 349.