AFL–CIOBuilding and Construction Trades Department, AFL–CIOClara FraserCommittee for a Revolutionary Socialist PartyDave BeckEmergency Committee of Atomic ScientistsFair Play for Cuba CommitteeFrederick George HamleyHarvey O'ConnorInternational Longshore and Warehouse UnionJohn HandcoxLanka Sama Samaja PartyMyra Tanner WeissNational Association for the Advancement of Colored PeopleNational Coordinating Committee to End the War in VietnamNational Organization for WomenNew Order of Cincinnatus