Her daughter didn't get pregnant until after Palin was announced.
-PJ
Unfortunately, Sarah had family issues. She had a newborn, which was bad timing. Leaving a newborn behind to campaign, especially one with special needs, looked bad for a mom of 5. Also, Bristol was pregnant at the time when McCain chose Sarah—she gave birth in December. Having an unwed pregnant teen daughter was a nightmare front and center. I don’t know what McCain was thinking unless he felt he had nothing to lose.