As of 1944, his Popular Front memberships included the Committee on Election Rights, Prestes Defense Committee, Schappes Defense Committee, Reichstag Fire Trial Anniversary Committee, National Federation for Constitutional Liberties, American Committee for Protection of Foreign Born, American Committee to Save Refugees, United Spanish Aid Committee, Non-Partisan Committee for the Re-election of Congressman Vito Marcantonio, National Negro Congress, Public Use of Arts Committee, and National Council of American-Soviet Friendship.