Tina Fey on Palin: "If she wins..I'm leaving earth!"

Tina Fey told TVGuide she'll be "done" if John McCain and Sarah Palin win the election next month.

The "SNL" veteran who has come back to play the Republican Vice Presidential candidate (and whose own show, "30 Rock," is still nowhere to be seen), said, "We're gonna take it week by week. If she wins, I'm done. I can't do that for four years. And by 'I'm done,' I mean I'm leaving Earth."

Fey also said it's a busy but exciting time for "SNL."

"Election time is always good for [SNL] and this is a bonkers election," she said. "And that lady is a media star. She is a fascinating person, she's very likeable. She's fun to play, and the two bits with Amy [Poehler], that was super fun," Fey says.

For the full story, pick up the October 20th issue of TV Guide, plus the following week's issue (October 27th) featuring TV Guide's cover story on 30 Rock's Tina Fey and Alec Baldwin.