Progressive Citizens of America

Progressive Citizens of America (PCA) was a social-democratic and democratic socialist American political organization formed in December 1946 that advocated progressive policies, which worked with the Congress of Industrial Organizations (CIO) and allegedly the Communist Party USA (CPUSA), as a precursor to the 1948 incarnation of the Progressive Party. It also led to formation of a counter group called Americans for Democratic Action (ADA), formed in January 1947 with progressive domestic views but anti-communist and interventionist foreign policy views, that split liberals and nearly cost Harry S. Truman the 1948 United States presidential election.

Source: Wikipedia — Progressive Citizens of America (CC BY-SA 4.0)