Obama did not graduate from Columbia University, he graduated from Columbia College, a small division of Columbia that had only about 1800 students, none of whom remember seeing Obama in class. It is also interesting that William Ayres was residing just a block or two from Columbia College at the time. They could have known each other.
Also, didn’t Obama go to Pakistan during the time that he was supposed to be at Columbia College? I think that the College is a division of the university which allows you to write your own course work contract, like Evergreen in WA state. It is possible that Obama got college credit for studying in Pakistan.
Care to comment?