Washington Commonwealth Federation

The Washington Commonwealth Federation (WCF) was a political pressure group established in the American state of Washington in 1934 as "Commonwealth Builders, Incorporated" (CBI). The organization changed its name to Washington Commonwealth Federation in 1935. The organization did not run political candidates in its own name but rather functioned as an organized faction in the Washington State Democratic Party.

Originating out of an interest to expand the End Poverty in California movement to Washington state as a means of alleviating the misery of the Great Depression, the WCF came to be dominated by the Communist Party USA beginning in the popular front years of the late 1930s. Charged by critics to be a Communist front, the WCF was dissolved in 1948, during the era of the Second Red Scare.