Did Obama win the Dem Primary cause of his race?

[I spent the winter writing songs about getting better]

You're not taking into account the votes he lost because of his race. Look at Kentucky and West Virginia.

[I spent the winter writing songs about getting better]

Edwards actually won both the black and white vote in SC in 2004, though he won whites easily with a majority, and won only a narrow plurality of blacks over Kerry.

[I spent the winter writing songs about getting better]

Obama would've still won all the Super Tuesday caucuses, would've likely won New Mexico, had a better chance of winning California (He wouldn't do as badly among Hispanics if he was white.) and might still win some southern states like Georgia (where he also greatly benefited from whites voting against Hillary in addition to blacks.)