In good signs for Barack Obama, the early exit polls have suggested that the race in Pennsylvania is too close to call.
The first exit poll suggested that Clinton had the lead, but only by a razor thin margin of 52%-48%. Early exit polls tend to give Obama a boost, but even so, even a 55-45 split should be enough for Obama.
Only weeks ago, Clinton had a substantial lead in Pennsylvania. Obama has steadily eroded that margin.
Up to half of the 4 million registered Democrats in Pennsylvania were predicted to have cast their ballot today, with long lines stretching from many polling stations.
Early Exits - Too Close to Call
