the growth of Americans for Democratic Action and other liberal organizations, which tapped the SDF's support among sympathetic progressives. This decline made the SDF more amenable to reunification with the Socialist Party, which lost members while maintaining its opposition to communism and critical support for the U.S. policy of containment. After several years of negotiations, a merger was finally accomplished in 1957 to form the Socialist Party-Social Democratic Federation (SP-SDF). A small group of holdouts refused to reunify, establishing a new organization called the Democratic Socialist Federation. Publications The SDF published a monthly, Social Democrat edited by Algernon Lee, August Claessens and Liston Oak. It ran from Vol. I #1 July 1944 to Vol XII #5 December 1955. Social Democratic Federation U.S.A: principles and program. Washington, D.C. : Social Democratic Federation U.S.A., 1937 Louis Waldman Should unions be incorporated? Responsibility of unions under the law, Washington, D.C. : Social Democratic Federation U.S.A., 1937 Frederick Shulman The meaning of social democracy New York City, N.Y. : Social Democratic Federation, 1940 Souvenir Journal : Social Democratic Federation, Ninth Anniversary Celebration. New York : Social Democratic Federation, 1944 William Feigenbaum "Let us review the scene" with William Feigenbaum New York City, N.Y. : Social Democratic Federation, 1951 See also Socialist Party of America Footnotes External links Guide to the Social Democratic Federation of America Records 1933–1956. Collection maintained by Tamiment Library/Robert F. Wagner Labor Archives at New York University. 6.5 linear feet (13 boxes). Call Phrase: Tamiment 011 R2644-R2647. Accessed Feb. 11, 2009. Socialist Party of America Political parties established in 1936 Political parties disestablished in 1957