There is considerable variation in the percentage of whites who voted for Obama. Where African Americans made up less than 20% of the vote (according to exit polls), whites varied from 30% to 60% in their support for Obama but with no relationship to the size of the African American vote. As the African American electorate rose above 20%, white support for Obama fell sharply to barely 10%.
African American support for Obama varied from 90% to 100% in the 28 states that had sufficient sample size to report exit results for the group. In the 13 states with large enough samples, Hispanic voters supported Obama between 56% and 78% of the time.