Which role does NOT belong to the President's cabinet?

The role that does not belong to the President's cabinet is the Chief of Staff. The cabinet is composed of the heads of the executive departments and other key officials appointed by the President, who typically have direct responsibilities in overseeing the operations of their respective departments and advising the President on various issues.

The Secretary of Treasury and the Attorney General are both part of this cabinet; the Secretary of Treasury oversees economic policy and financial regulation, while the Attorney General serves as the head of the Department of Justice and is responsible for federal legal affairs.

On the other hand, although the Chief of Staff plays a crucial role in the administration by managing the President's schedule and staff, they are not a cabinet member. The Chief of Staff is considered part of the White House staff and serves as a key advisor, but does not head a specific executive department. The Vice President, while sometimes closely involved in decisions and consultations with the cabinet, is not considered a cabinet member in the traditional sense but holds a distinct constitutional role.