Workers Party of the United States was created in 1934.
Socialist Workers Party - United States - was created in 1938.
International Workers Party was created in 1974.
Workers Party of the United States ended in 1936.
United Socialist Workers' Party was created in 1993.
Polish United Workers' Party was created on 1948-12-21.
United Workers Party - Saint Lucia - was created in 1964.
United Jewish Socialist Workers Party was created in 1917.
Constitution Party - United States - was created in 1991.
Union Party - United States - was created in 1936.
Green Party of the United States was created in 1991.
Justice Party - United States - was created in 2011.
Opposition Party - United States - was created in 1854.