(CNN) - There were more than 150,000 new voters in the Pennsylvania primary and they overwhelmingly voted for Barack Obama, the just released exit polls show.
Among first time voters, 60 percent went for Obama while only 38 percent went for Clinton. That discrepancy could keep the race close.
But in good news for Clinton, among voters who decided in the last week, she bests Obama by 16 points, 58 percent to 42 percent.
Clinton has won among late deciders in prior contests, but she was likely helped in Pennsylvania by Barack Obama's at-times shaky debate performance Wednesday night.