I don't have polls or numbers or statistics, all of which are meaningless anyway and can be doctored or fudged or whatever to "prove" any point the presenter of said statistics wants.
In other words, you have no evidence for your assertion that a majority of Obama supporters in 2008 voted for him because of his race and are now attempting to cast doubt on the methodology used to gather information about numbers of people that vast.
All I have is my common sense that tells me how people behave and my observations of how people behave
Which is to say, you have no evidence.