Before he was president, Barack Obama taught constitutional law. Two of his most recent acts prove he knows nothing about the U.S. Constitution.
First, he wants to violate the Second Amendment by taking away guns. Second, he has violated the Fifth Amendment due process clause that guarantees U.S. citizens a fair trial before executing them. He has authorized drone attacks to kill U.S. citizens.
The president must have been a professor of the Kenyan constitution.