LOL, your politics are in big trouble if you consider Jon Stewart a "news" source. Also, can you show us an example where he lied?
Not a Stewart watcher here, but I suggest a way to examine him.
The best liars craft carefully culled truths, ie, they prevaricate.
Are his barbs balanced among the various political parties?
This is where I see most falsehoods appearing with Fox, MSNBC, NYT, etc.
A good example was coverage of Clinton's relationship with Lewinsky.
Matt Drudge was excoriated by leftish media for exposing facts which they were covering up.
By proffering no falsehood, they lied in a most effective way.
Their silence on Kennedy's dalliances was even more deafening. (Geeze, what an over-used cliche, eh?)