This has never, ever been documented. most of his classmates at Harvard Law School felt he was a bloviating affirmative action baybe.
True. And they will say so in private. But like good lawyers everywhere, they make sure that stays off the record. Those who worked with him on the HLR, are the same way.
However, there are those Harvard Democrat Kool-Aid imbibers who are only too happy to go ON the record. They are the ones who get quoted.
What is unknown to the public is that NO ONE actually flunks anything at Harvard Law ... or other fine law schools. Achievement is recognized, substandard performance tends to be ignored.