The executive office of the president works most closely with the president of the United States. The executive office of the president is headed by the white house chief of staff and consists of the president as well as various support staff.
James Polk
The secretary of state and the secretary of defense generally work most closely with the president on foreign policy.
Kernel mode.
Chief of Staff
Andrew Jackson
James Garfield
Franklin Roosevelt
Franklin Delano Roosevelt
Barack Obama
No agencies work with the president. Members of his cabinet are usually the head of various departments.
chief of staff. A+