Hussein was NEVER a professor. He was a lecturer. I think he was merely a “visiting lecturer.”
Both liberal and conservative commentators and reporters continually repeat the falsehood that he was a professor.
He was an "adjunct professor" = a non-tenure-track resume-enhancer for local lawyers to 'give back' to their alma mater. It's also a way for the law school to keep in touch with local law firms or (in Obama's case) do a favor for some influential local politician.
I was an "adjunct professor" for years at my law school, but I was never under any illusions as to the importance of it or that it meant that I was a particularly learned person or great lawyer. I was helping out my school and getting something nice and public-spirited to put on my resume, nothing more.
-- this sort of position I suppose is technically speaking a "professor" because it's in the title, but it is either unpaid or carries a very small honorarium. IIRC, I got the whopping sum of $200 for a whole semester's work. Didn't even pay for my outlay in gas and paper, never mind my time.
The Halfrican was certainly not a scholar, ‘cept maybe communism.