President Barack Obama!

He's mixed race. His mother was white and his father black. If you say he is black it's just as valid to say he's white.

It defiantly is significant that he has black heritage in the context of US politics but it's what his plans are that people should be judging him for rather than "ohh a man with a black Dad is going to be president".

It's not really as he is black.

Try telling the US that they have another valid white President.