Trump has fired and/or has had turnover in the following departments:
White House Deputy Chief of Staff, Director of the White House Military Office, White House Deputy Chief of Staff (Policy), Special Assistant to the Chief of Staff, Associate Director of Presidential Personnel, Director of the Office of Chief of Staff, Senior Counselor to the President, White House Chief Strategist, Counselor to the President, Director of the Office of Public Liaison, White House Director of Presidential Personnel, Advisor to the President (Domestic Policy), Assistant to the President and Director of the Domestic Policy Council, Deputy National Security Advisor (Strategy), White House Cabinet Secretary, White House Deputy Cabinet Secretary, Special Advisor to the President on Regulatory Reform, Assistant to the President, Deputy Assistant to the President, Special Assistant to the President, Director of Policy for the First Lady, Chief of Staff to the First Lady, White House Director of Information Technology, Special Assistant to the President (Legislative Affairs), National Security Advisor, Deputy National Security Advisor, Deputy National Security Advisor for Middle East and North African Affairs, Homeland Security Advisor, Deputy Homeland Security Advisor, Executive Secretary and Chief of Staff of the National Security Council, Executive Secretary of the National Security Council, Director of Strategic Planning of the National Security Council, Deputy Chief of Staff for the National Security Council, Senior Director for Strategic Communications and Spokesperson for the National Security Council, Senior Director for Intelligence Programs of the National Security Council, Senior Director for Western Hemisphere Affairs of the National Security Council, Senior Director for European and Russian Affairs of the National Security Council, Director for European Affairs of the National Security Council, Senior Director for Middle East and North African Affairs of the National Security Council, Senior Director for African Affairs of the National Security Council, Senior Director for Asian Affairs of the National Security Council, Senior Director for Gulf Affairs of the National Security Council, Senior Director for Global Health Security and Biodefense of the National Security Council, Senior Director for International Organizations and Alliances of the National Security Council, Senior Director for Counterterrorism of the National Security Council, Senior Director for Defense Policy and Strategy of the National Security Council, Senior Director for Emerging Technologies of the National Security Council, Director for Medical and Biodefense Preparedness Policy of the National Security Council, White House Staff Secretary, White House Personal Secretary, Director of Oval Office Operations, White House Press Secretary, White House Director of Communications, White House Director of Strategic Communications, White House Deputy Chief of Staff (Communications), White House Principal Deputy Press Secretary, Deputy Press Secretary, White House Deputy Director of Communications and Research, White House Deputy Director of Communications, Assistant Communications Director for Surrogate Operations, Deputy White House Communications Director, Senior White House Assistant Press Secretary, White House Director of Media Affairs, White House Director of Advance, Deputy Director of the Domestic Policy Council, White House Director of Budget Policy, White House Director of Legislative Affairs, Special Assistant to the President (Economic Policy), White House Deputy Director of Legislative Affairs of Nominations, Director of the National Economic Council, Deputy Director of the National Economic Council for Economic Policy, Deputy Director of the National Economic Council (International Policy), Director of the National Trade Council, Director of the Office of Intergovernmental Affairs, Deputy Director of the Office of Public Liaison, Director of Communications for the Office of Public Liaison, White House Director of Political Affairs, White House Counsel, White House Deputy Counsel, White House Special Counsel, White House Associate Counsel, White House Deputy Associate Counsel, Personal attorney for President Trump, Legal Advisor to the President, White House speechwriter, White House speechwriter and Policy Aide to the President, Personal Aide to the President, Physician to the President, Chairman of the Strategic and Policy Forum, Chair of the Opioid and Drug Abuse Commission, Member of the Opioid and Drug Abuse Commission, Vice Chair of the Presidential Advisory Commission on Election Integrity, Co-Chair of the Council of Governors, Member of the Council of Governors, Administrator of the Office of Information and Regulatory Affairs, Director of the Office of National Drug Control Policy, Deputy Chief of Staff for the Office of National Drug Control Policy and White House Liaison, Trade Representative, Chairman of the Council of Economic Advisers, Special Representative for International Negotiations, Office, Chief of Staff to the Vice President, Deputy Chief of Staff to the Vice President, Director of Communications to the Vice President, Press Secretary to the Vice President, Deputy Staff Secretary to the Vice President, Associate Director of Domestic Policy for the Vice President, National Security Advisor to the Vice President, Deputy National Security Advisor to the Vice President, Special Advisor to the Vice President on European and Russian Affairs, Secretary of Agriculture, Deputy Secretary of Agriculture, Director of Policy and Strategic Planning, Under Secretary of Commerce, Assistant Secretary of Commerce, Director General of the United States Commercial Service, Director of the Minority Business Development Agency, Deputy Director of the Minority Business Development Agency, Director of the United States Census Bureau, Secretary of Defense, Deputy Secretary of Defense, Chief of Staff to the Secretary of Defense, Director of Communications to the Secretary of Defense, Chief Management Officer of Defense., Deputy Chief Management Officer of Defense, Director of Cost Assessment and Program Evaluation, Under Secretary of Defense, Assistant Secretary of Defense, Assistant to the Secretary of Defense, Director of the Defense Advanced Research Projects Agency (DARPA), Secretary of the Air Force, Under Secretary of the Air Force, Secretary of the Army, Secretary of the Navy, Assistant Secretary of the Navy, Department of Defense Inspector General, Member of the Defense Science Board, Secretary of Education, General Counsel of Education, Chief Financial Officer of Education, Chief Strategy and Transformation Officer of Federal Student Aid...
There's more but I had to shorten it because it was beyond the 10,000 character limit.
[Use this
wiki, copy into excel, use =concatonate(transpose(array) formula to produce]
Again, just because the executive branch can change the boss, doesn't mean they dictate the boss. They can choose the boss and assume that the boss will impose what they want...but that boss also can't break the law. China's CCP is so strong because there are no laws against the government from becoming authoritarian and enforcing whatever they want.
The assumption that because the president can oust a boss therefore making the position and/or agency invalid, would pretty much destroy our democracy