Tina Fey has been absolutely nailing Sarah Palin (not to be confused with the porn film “Nailin’ Paylin”) week after week on SNL. So what’s Sarah Palin’s response? Taking her on in a battle of comedic wits.

It’s looking more and more likely that Alaska Gov. Sarah Palin will appear on ”Saturday Night Live” — to have some fun with Tina Fey.

As the comedian’s impressions of the GOP vice presidential candidate draw laughs from Republicans and Democrats alike, a top honcho from the John McCain campaign tells me there’s a debate going on about how to respond.

Some key McCain staffers are content with Palin joking about the “SNL” routines on the campaign trail — as when she scribbled “I’m not Tina Fey” on a supporter’s cell phone and said she’d dressed as Fey on Halloween. But others — including the governor herself — think a return punch on the NBC airwaves is what’s needed.

I’m hearing some sort of Palin tweak of Fey’s American Express commercials is in the works.

I think this will be another home run for Sarah Palin. Because, when seeing her, if there’s one thing you can tell, it’s that she has a great, edgy, biting sense of humor. She’ll probably really come out swinging with some fierce jokes like “Oh, I’m Tina Fey, I look like Sarah Palin!” or perhaps “I’m Tina Fey, I read stuff, look at me and all my words!” That’ll show her for accurately portraying Sarah Palin for the bumpkin that she is.

You know who wouldn’t be all cutesy trying to one-up a satire? William Taft. He’d just lay there, bedridden, unable to lift his massive hindquarters. Then he’d request another fresh pig. That’s just how Taft rolls, baby. Get out of his way. Seriously. Get out of his way, he’ll roll like the boulder in Indiana Jones.