X-post) http://www.reddit.com/r/AskHistorians/comments/2krnv8/whatistheoldestjokewehaveonrecord/
On duck tape !
Because it was deep space . (the joke is how the outer space was very deep)
A good start! **an old joke that my dad used to tell at every party. You could replace "liberals" with pretty much anything.
You know they are going to keep coming back, and despite the fact they are weaker each time, you still don't look forward to them.