The media establishment's laugh track
What's amazing is how many national journalists take their queues from comedy shows. Stewart's skewering of Clinton was funny, but it was meant to be funny. It wasn't meant to be a serious analysis of Clinton's character. Just an example of, "wasn't that a bit odd?" poking of fun.
I expect Stewart would be dismayed as anyone that people would take a joke about Clinton's laugh as being the foundation of a serious political analysis.
But of course, we must remember that this is the same media establishment that tooks it cues for criticizing Al Gore's 2000 debate performance from a sketch on Saturday Night Live!