The problem is, they're one of our two major parties.
The most visible differences (abortion, stance on war, gay rights) are relatively small, much smaller than the similarities.
To hear 'left wing' and 'right wing' thrown about and the Democrats labeled 'socialist' is really confusing.
Funnily enough, when Thatcher was Prie Minister, she tried to pass a law banning joke candidacies, but failed. Besides challenges from Screaming Lord Sutch and various campaigners for lighter drinking laws, she also faced challenges from the dread-but-obscure Darth Vader lookalike, Lord Buckethead (Gremloids).
Are they self-reproducing? http://en.wikipedia.org/wiki/Quine_%28computing%29
http://en.wikipedia.org/wiki/Official_Monster_Raving_Loony_P...
I would vote for Tarquin Fin-tim-lin-bin-whin-bim-lim-bus-stop-F'tang-F'tang-Olé-Biscuitbarrel.