Reply #30: How about the one..

[Pied Piper]

... where GHW Bush and the Gila Monster moved into the house accross the street? Bart terrorizes Poppy and ruins his memoirs, Poppy does donuts on the Simpson's lawn, Babs tells Marge, "Oh it was just like that with Noreiga!"

The kicker is after the Bushes move out, Gerald Ford moves in. He invites Homer to come over to watch a football game, and they both trip at the end of the driveway. D'oh!