Lots of good ones here, but cant believe no one has brought up kodos and kang.
Sorry for the post spamming everyone, but I haven't seen this thread for a few days and needed to catch up.
The TOH where they disguise themselves as Bob Dole and Clinton is one of my favorite TOH shorts. Every joke is hilarious. To list a few:
-(Clinton, while he & his bed are being abducted from the White House): "Wha? Is it noon already?"
-At a political rally "When I was a boy, I dreamed of being a baseball"
-Homer kicking the small bush that's "disguising" the huge spaceship
-Ross Perot punching through his straw hat
-And the classic, "Don't blame me, I voted for Kodos"
You're all amazing. This is undoubtedly my favorite thread on SLAP ever.