Her parody of Sarah Palin may have been a huge hit on "Saturday Night Live," but Tina Fey believes it actually has hurt the ratings for her NBC series "30 Rock," reports USA Today. "Some may argue that exploiting Governor Palin and her family helped bring attention to my low-rated TV show,"  Fey says of … Continue reading Tina Fey: My Sarah Palin impression hurt '30 Rock'