People are going to be annoyed with me for saying this out loud, but, whatever: If Obama wins, what are those folks going to say who donned their hat of sociological expertise and declared that America was nowhere near ready to elect a Black president? Lots of people made statements like this privately in the time preceding Obama winning the nomination, including some people I know who expressed this as a proto-self-fulfilling-prophecy reason for not being eager to support Obama in the primaries.
Consider also, for instance, a couple blog-quotes from a former American Sociological Association president:
1. (April 2008) Since Obama could never win any way, because of the high level of white racist thinking about black men (polls show him at only 37 percent of white voters vs. McCain), I tend to think that the heroic Dr. Wright speaking out is a good thing, esp. since he is one of our outstanding thinkers on the morality of race and racism.
2. (June 2008) It is my educated guess that this 26 percent of whites is likely the minimum percentage of whites who will actually vote against Senator Obama in November just because he is Black.