In one episode we catch the tail end of a speech by Clinton's head. It went something like:
Clinton: So he said, "Your presidency was the worst thing ever". And I said, "That all depends on what the definition of 'was' is." Thank you everyone. You owe me $200,000.
Can anyone ID this episode?
Although not exactly the same, this sounds loosely similar to the end of the Simpsons episode "Saddlesore Gallactica," where Clinton admits "I'm a pretty lousy president." (Bear in mind, aside from the Clinton scenes, the episode is....not worth watching.) I'm in no way certain that's what you're thinking of, but it's the best possibility that's coming to mind. I concur with other members; I'm pretty sure that quote isn't from a Futurama episode.