imagine that you are writing a report on the people who most influence a president during the administration which advisor would be the best source of Presidents personal thoughts

Chief Of Staff

The title chief of staff recognizes the leader of a complicated system, organization, or body of individuals and it likewise may recognize a primary staff officer (PSO). The PSO administrator of the approving staff or the main aide-de-camp to an extraordinary positioned person, example a president or a superior army officer.