For her YouTube videos, Benincasa zeroed in on Palin's unusual accent that both Alaskans and Midwesterners claim as their own. She stars in the videos with her comedy partner, Diana Saez, who plays Dina Heath-Barr, Palin's fictitious campaign manager/cousin/stylist/nail technician/jazzercise partner.
"Woven into our jokes about moose hunting are some actual salient points about her opposition to women's reproductive rights, in terms of access to abortion and real sex education," Benincasa told ABCNews.com. "Ultimately, we did it just to be funny. We're lampooning a political character that we think is ridiculous in some ways and definitely beneath McCain's caliber."
As for who's getting the joke, Benincasa said her fans include "whiny liberals like us" and a surprising number of conservatives. She's gotten e-mails that say, "I like Sarah but I like you too" and "I'm a Republican but I think this is funny."
But Benincasa said she would be surprised if any of these comic swipes have any effect on the electorate.
That's unlikely to stop the Palin impersonators from taking their best shots. If Fey doesn't return for an encore, comedian Cho has thrown her name in the ring.
"I think I make a pretty good Palin myself," she said.
The Associated Press contributed to this article.