Comes from The Root's Kim McLarin who, assessing Barack Obama's efforts to bat down the "whitey" rumor, writes:
What he hasn't done—because he cannot if he wants to win the presidency—is roll out the clearest and most obvious knockdown of Whiteygate. Namely this: "When the hell was the last time you heard a black person call somebody 'whitey?'"
I mean, come on. White man, please.
Personally, I'm partial to the term "cracker." Then again, I am one, so take that for what it's worth.