Senator Hillary Clinton won big in Pennsylvania, but was it big enough to change the momentum of the campaign? Even after her decisive ten-point victory last night over Senator Barack Obama, why are most political analysts still giving her no more than 10% chance of winning the Democratic presidential nomination? Guest host Lawrence O'Donnell talks about when and how the super-delegates will have to intervene to pick a winner. Also, General David Petraeus is named head of Central Command. On Reporter's Notebook, is the truth about NAFTA a victim of the presidential campaign?
Was Hillary Clinton's Win in Pennsylvania Big Enough?
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