A writer wrote recently to vote for Obama because he is black and a Democrat. If this is your belief, then why vote? It's going against everything that Martin Luther King fought for.
You don't judge a person by the color of his skin, but the content of his heart. You vote for the best person that you feel will do more for this country, not to make history.
If you watch him give speeches, then you will see that the "half white" comes out. He shunned the blacks in Jacksonville, Fla. He doesn't say what he'll do for the blacks because they're going to vote for the "brother." Remember he's half white, and it shows.