By sending — literally — brownshirted enforcers to engage in — literally — a midnight knock at the door of a man for the non-crime of embarrassing the President of the United States and his administration, President Obama violated that oath. You can try to pretty this up (It’s just about possible probation violations! Sure.), or make excuses or draw distinctions, but that’s what’s happened. It is a betrayal of his duties as President, and a disgrace.