Consider, too, that Obama recently called on "young people, African-Americans, Latinos, and women who powered our victory in 2008 [to] stand together once again."
Why assume that all "African-Americans" and Latinos were on Obama's side in 2008? Because that's the way he thinks. Statistically, one could make the case that the number of people that fit into the "African-American" and "Latino" labels he refers to that stood against him would be relatively insignificant, and therefore not worth counting, but I'm sure they would beg to differ. Every person's opinion matters, whether they are statistically worthy or not.
Is Obama actually a racist? I don't know. I don't think I have enough information to make that call accurately. If we were to go with the Liberal definition (which the Liberals themselves surely wouldn't), the answer would be a resounding "YES!" (See, the Liberals tend to be completely blind to their hypocrisy. They are like Congress, applying rules they make to others, without applying the same rules to themselves.)
The sad thing is that there are racists on both sides, to the Left and the Right. The Left focus in on the right-wing racists and (wrongly) accuse all "right wingers" as being of the same ilk, all the while ignoring the fact that the Left has similar issues that need to be dealt with.
 I'm referring here to American Liberals, not to be confused with the Canadian or European variety.
 We'll ignore the fact that "African-Americans" don't really exist, as such, any more than "Asian-Americans" or "European-Americans" do. Yes, there are people whose ancestors originated from the African continent, but we generally aren't sure exactly which country they originated from.
 LasCulturas.com has an interesting perspective on the term, its usage, its history, and its acceptability.
 I'm thinking specifically of the Reverend Jesse Jackson and Reverend Al Sharpton, both of whom sided with an alleged rape victim, a case in which charges were dropped and the case dismissed. Interestingly enough, both Jackson and Sharpton have yet to apologize for comments they made "on Magnum's behalf" against the accused.