I think he either has something *else* to hide or he is having fun making the birthers the face of the political opposition.
What is likely is that Obama Sr. impregnated Stanley A. Dunham, and then married her because of pressure from her parents or perhaps he saw the Dunham family as a ticket to a US university. He never loved her and abandoned her soon after they married, heading back to Kenya. Obama’s mother followed him there to give birth with hopes that he would acknowledge his son. Obama Sr. never did and wouldn’t even sign the birth certificate.