Blacks were nearly half the Democratic primary electorate and Obama racked up one of his largest margins yet among them. He won nearly nine in 10 blacks, male and female, according to the exit polls for The Associated Press and television networks. Most other Democratic voters were white and Clinton won them by about 40 points, a margin she has met or exceeded only in Alabama, Tennessee and her former home state of Arkansas among 19 Democratic primaries surveyed this year.
Call me naive, but it really surprises me to see voting patterns like this during the Democratic primary.  Particularly surprised Obama didn’t do better among white voters.