American Party Anti-Monopoly Party Bull Moose Party Communist Party Conservative Party Constitutional Union Party Democratic Party Democratic-Republican Party Farmer-Labor Party Federalist Party Free Soil Party Greenback Party Know-Nothing Party Labour Party Liberal Party Liberal Republican Party Liberty Party National Republican Party Populist Party Progressive Party Prohibition Party Republican Party Socialist Labor Party Socialist Party Socialist Workers Party Tammany Hall Tory Party Whig Party camp city hall faction machine major party minor party multiple party system one-party system party party in power political machine political party splinter party third party two-party system