Under his guidance he and Nixon practiced 'Realpoltik' in foreign affairs. Meaning they would be 'realistic' and act in the best interest of the US in foreign affairs without regard to politics, political party philosophy, or an ideology of themselves or foreigners, instead they would act to get the best outcome possible and plan it all out ahead of time.
The president is always top adviser, therefore he is the Head of State of and the Head of the Government of the United States.
Gatekeeping is increasing more and more. The idea of gatekeeping is that the gatekeeper is the person who disseminates the news towards people, such as news agencies or paper companies or similar things. Since you have companies owning more and more news agencies at the same time, they basically can control what all the different news services will say, which means that anything that would not be considered to be valid news would be prevented from reaching people.