Obama did manage to graduate Magna Cum Laude from Harvard Law School while also becoming President of Volume of the Harvard Law Review, the most prestigious position for a Harvard Law student:
http://smartharvardadmissions.com/profiles-notable-harvard-alumni/
And likewise has the notable distinction of being the only President of the Harvard Law Review that never submitted a paper. I have little doubt that they simply put him there because they desperately wanted to show how "diverse" they were, and not because he deserved to be there. Had he been white, with the exact same scholastic achievements, he wouldn't have even gotten into Harvard, let alone become President of the Harvard Law review.
Once again I point out that if his grades were good, we would have had his side shoving them in our faces for the last seven years. What his grades will show is that he was an affirmative action token who wasn't really capable of doing Harvard caliber work.