I was listening last night to explanations on the role of chief justice Roberts of the US supreme Court. Roberts in Trump versus presidential immunity. The explanation was from a constitutional law professor.
Constitution of the United States
www.senate.gov
Roberts is proponent of the unitary model of presidency. Basically, Roberts affirmed that the president can use his discretionary power to fire anyone working for the government. The keyword as far as trump is concerned is discretionary.
Previously, Congress sets up departments and agencies, processes and statutes how government should be run. Their heads swear to uphold the law faithfully and can only be fired by the president on good causes like inefficiency or corruption.
What chief Roberts did is simple and yet has created worldwide upheavals. It has turned the phrase 'we all serve at the president's pleasure' into something much more sinister, turning Trump into chief of the treasury, trade, justice, EPA, universities etc.
The prospect that issues on separation of powers are not on the mind of populist voters is frightening.