That the Tina Fey-Sarah Palin impersonation is an exaggeration, like most impersonations are. She even says in interviews that the accent is a lot different from the real thing. And SNL is completely liberal, if you haven't realized this you're pretty thick.

It's funny the first time, but all the other sketches involving Tina Fey as Palin weren't funny at all. It's basically rehasing stereotypes primarily thought up by Obama supporters and I don't think something is funny when it's shoving it's political agenda down everybody's throat. I think if politics is part of comedy, the writer's agenda shouldn't be made so f**king obvious. Have the writers of the main SNL sketches nowadays ever heard of a little thing called subtlety?
And don't call me a McCain supporter, I actually support Bob Barr and Ron Paul, although I'm not old enough to vote yet so it doesn't matter.
Every now and then, the main writers(Seth Meyers and Jason Sudeikis) come up with a great sketch(Bill Hader's spoof of Dateline is the most recent), but most of the good stuff is from The Lonely Island.