Palin says she thought a bad grade years ago would be extent of controversy . Palin 's interview with Oprah Winfrey comes a day before her book hits . Comment: Ticket lost because economy changed under GOP administration , Palin says .
Palin says she thought a bad grade years ago would be extent of controversy . Palin 's interview with Oprah Winfrey comes a day before her book hits . The way campaign handled Bristol 's pregnancy was first in string of frustrations for Palin . Ticket lost because economy changed under GOP administration , Palin says .