Politix, you have GOT to add a "NONE OF THE ABOVE" choice for these types of questions! These "pundits" are nothing more than lib/con propagandists, deceivers, and false prophets, corrupting the minds of the people and leading them astray.
He's sarcastically conservative. He mocks conservatism with is stubborn, bigoted character. Brilliantly. If Jon Stewart was the conservatives definition of "liberal" he wouldn't criticize Obama and other liberals.
He is a very knowledgeable and avid proponent of logic and liberal/progressive ideology with a comedic twist. It makes him fun to watch and easy to learn from. He's also unapologetic, meaning that unlike most liberals, he actually has a backbone and stands his ground.
He's a liberal? Seen on his show few times that he claims to be a conservative? I guess that part of his "character" on the show. Either way he is extremely funny and has my type of sense of humor of sarcasm. Love watching his show cause he always, like Jon Stewart, pokes fun at both parties but I would say Jon way more liberal than Colbert. One of my favorite comedians.