Here are two of my favorites.

It's called "This Land" and it's by JibJab.
http://www.jibjab.com/thisland.html (the server is often busy so I used the source code to find some mirrors which are below.)
http://boldt.us/jibjab/mirror.html
http://69.93.11.34/mirror.html
http://jibjab.steadfastnetworks.com/mirror.html

And this one is called "End of the World", but it has some bad words in it.
http://starterupsteve.servepics.com/swf/endoftheworld.html
http://fightingfury.gamepoint.net/endoftheworld.swf
http://albinoblacksheep.com/flash/end.php

post yours

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Please join us in the already existing political jokes thread