The big two (alphabetical): Democrats Democratic Nat'l Committee Democratic Senate Leadership Republicans Republican Nat'l Committee GOP.gov (current Leadership)
various others (alphabetical): Communist Party Constitution Party Green Party Libertarian Party Natural Law Party Reform Party Socialist Party
The American Cause Conservative group Americans for Democratic Action Liberal group Common Cause promoting open and accountable gov't Empower America promoting conservative issues Friends of Earnest a TRUE watchdog group! Institute for Civility in Gov't working for change Judicial Watch watchdog against corruption Nat'l Committee for an Effective Congress Liberal Nat'l Strategy Forum public involvement in foreign affairs OpenSecrets.org Watching money in politics PublicPolicy.org Info on Current Issues U.S. Ass'n of Former Members of Congress