In the future, "Hey, I voted for Barack Obama!" will be every white person's get-out-of-racism-free card. It's perfect: 1) a real racist (at least, an anti-black racist) would presumably not vote for a black man for president and 2) it's completely unverifiable! Perfect! It's like saying you were part of the French Resistance in 1943.
Hey, you should always look on the bright side.