It will eventually come out, it may be years after he is out of office, but it will eventually come out.
A man named Frank Marshall Davis, a black activist back in the late 50's, had an affair with a young 15 year old girl named Ann. The activist was married at the time. There were no abortion laws back, so imagine what would have happened to a 40 some year old black activist who knocked up a 15 year old white teenager back in those days. If I were Frank Marshall, I'd get her out of town, or even ship her off to Kenya, A.S.A.P.
It is overwhelmingly agreed it was Marshall who took the nude photos of Obomas mother we see on the Internet today. The photographer was referred to as "Frank", and the pictures are in front of his home.
Oboma not only has his family life to hide, I can just imagine some of the left wing activist groups and foreign organizations he was or is associated with. If Davis is indeed his father, I wouldn't doubt Oboma has deep ties with the Black Panthers, and the associated activities could have a history tied to his college years.
There's no logical reason for him to be ashamed of going to Columbia and being proud of what he's accomplished. There's no reason to be ashamed of his American birth records, either. Is he not proud to have been able to enter a prestigious American University? Is he not proud to have been born an American?