Executive privilege (Government information) Official secrets 20 Security classification (Government documents) 15 Government information 12 Governmental investigations 11 Law and legislation 9 Executive power 8 Intelligence service 8 Legislative oversight 8 Officials and employees 8 Separation of powers 8 Freedom of information 7 Corrupt practices 6 Government policy 6 Contempt of legislative bodies 5 Powers and duties 5 Presidents 5 Corruption investigation 4 Courts 4 Discipline 4 History 4 Judicial process 4 National security 4 Subpoena 4 Constitutional law 3 Corruption 3 Disclosure of information 3 Dismissal of 3 Employees 3 Executive-legislative relations 3