Obama did not graduate from Columbia University, his degree was from Columbia College, a separate division of Columbia university, a kind of alternative school. It was a small campus and NO ONE from the school remembers him having been in their classes, no one at all. If he had been there someone would have remembered a black guy with an afro that didn’t talk much. You can’t major in political science without getting into discussions.
Looks like Hillary may have had his number but got the info a little bit too late to take him out.