I think it would be funny to try to get a representative of each of those parties to argue some issue.

Here are some of the wackiest of the wacky:
Libertarian National Socialist Green Party (that's right, they're libertarian greens AND Nazis!)
Progressive Labor Party (oh yeah right...as if America is going to go Stalinist sometime soon)
Revolutionary Communist Party USA (or Maoist...)
Expansionist Party of the United States (Watch out non-Americans reading this thread! These people want the entire English-speaking world to be annexed by the USA!)
Prohibition Party (Come on, give alcohol prohibition another chance! )
Christian Falangist Party of America (Fascist religious zealots...I have no idea how anyone with working brain cells could reach the conclusions these people reach)