From NBC's Mark Murray
One of the biggest secrets to Obama's success tonight have been his overperformance among white voters -- especially among college-educated whites.
In 2004, Bush defeated Kerry among whites by 17 points, 58-41 percent.
But according to the exit polls so far, McCain is leading Obama among white by 10 points, 54-44 percent.
And what has helped improve Obama's margins here is among college-educated whites. Nationally, McCain is leading Obama by just one point among college-educated whites, 50-49 percent.
By comparison, McCain is leading Obama among non-college-educated whites, 58-41 percent.