The New York Times published an article today about the Justice Department's investigation into the legality of the domestic spying program:
With Access Denied, Justice Department Drops Spying InvestigationQUOTE
An investigation by the Justice Department ethics office into the conduct of department lawyers who approved the National Security Agency's domestic surveillance program has been closed because investigators were denied security clearances, according to a letter sent to Congress on Wednesday.
If the Office of Professional Responsibility in the Justice Department can't conduct an investigation into the conduct of department lawyers, how does the Executive Department police itself?