19.23% of the American population voted for Obama, that is fewer than 1 in 5.
Many blacks voted skin color, many whites were trying to prove they were understanding and non racist, the swing vote largely was swung by Satan's Storm Sandy and of those few who voted for the dolt in chief, many now regret it as his popularity has again dipped.
He should play golf for 3 years, that's where he can do the least damage.
He won, whatever romney got, was less, and by your kind of thinking, if whites hadn't voted white, he would have won by much more. No, you need to look elsewhere for reasons, not that it changes anything, than skin color. You need to look at what he does and stands for, that's why he won. Actually you need to stop looking at it entirely and move on.