How about the 21,381 people in DC who voted for the party whose core message is to destroy DC's economy?
Lobbyists.
I am surprised Romney didn't get more votes in DC since asides from history when you look at the demographics I would think Romney's support should be in the teens. This means Obama got close to 80% of the white male vote and there are few if any other locations where Obama got over 2/3 of the white male vote. In most parts of the US, the white males vote GOP but at the very least even in the more Democrat areas you always have quite a sizeable minority of white males who vote GOP.