From American Thinker:
Uncle Sam

Lie one:  Obama was never a professor; he was a lecturer.  He did not have the qualifications to be a professor.  Obama never published a single law paper.  He was hired by the University of Chicago when they learned he had been given a book contract on race and law directly after graduating from Harvard.  There was no book – just the contract, which he later reneged on.  This is not the normal level of accomplishment for a University of Chicago professor or even lecturer.
Obama was not capable of writing, and eventually, after failing to deliver, he changed it to a memoir, which he also struggled with.  Finally, he asked Bill Ayers to write his memoir for him, using tapes that Michelle dropped off at the Ayerses’.
Lie two: Obama did not specialize in the Constitution.  Obama cared about and taught only one subject: race.  One course was about race in the Constitution.  It is on this flimsy basis that he attempts to pawn himself off as a constitutional scholar.
As the New York Times explains, Obama the lecturer taught three subjects only: “race, rights and gender.”
Lie three: Obama calls himself a constitutional law prof to imply that he loves the Constitution.  Obama gives the lie to this himself.  He is on record – literally, a radio interview done when he was a lecturer – slamming the Supreme Court’s interpretation of the Constitution because they never tried to invent a right to “redistribute wealth” – a failing he describes as a “tragedy of the civil rights movement.”  Obama laments the constraints on government power (what we would call liberty) imposed by our Constitution.   Obama himself contrasts following the Constitution with being a community organizer, creating “coalitions of power,” which could “redistribute wealth” and create “economic justice.”

It seems the majority of leftists have an issue with telling the truth, desiring to make themselves feel special and more important than they actually are.