Political Parties By lmleigh Period: Sep 30, 1792 to Sep 30, 1869 Pre-Civil War Democratic Party http://www.pbs.org/wnet/jimcrow/stories_org_democratic.html Period: Sep 30, 1854 to Sep 30, 1960 Classical Republican Party http://www.ushistory.org/gop/origins.htm Period: Sep 30, 1940 to Sep 30, 2014 Modern Democratic Party http://www.todayifoundout.com/index.php/2013/03/the-origin-of-the-american-democratic-party/ Period: Sep 30, 1971 to Sep 30, 2014 Libertarian http://www.lp.org/introduction/americas-third-largest-party Period: Sep 30, 1980 to Sep 30, 2014 The Soclialist Party http://socialistparty-usa.net/who-we-are.html Period: Sep 30, 1996 to Sep 30, 2014 The Green Party http://www.gp.org/what-we-believe/about-us Period: Sep 30, 2006 to Sep 30, 2014 The Tea Party http://www.theguardian.com/world/2010/oct/05/us-midterm-elections-2010-tea-party-movement