He had lots of Saudi money to get him entry, a degree, upper level position all without showing up or studying. I think he would have been a good drug counselor if he was no longer using.
Looks like he wasn’t a total flub:
http://www.thefiscaltimes.com/Articles/2014/07/09/How-Barack-Obama-Amazed-His-Harvard-Law-Professor
Studied the ethics of abortion and came out on the wrong side...