Membership should not be confused with command. The council advises and coordinates; it does not independently order troops, conduct diplomacy, collect intelligence, or issue a department's regulations. Those functions remain with the president and the departments and agencies that possess constitutional or statutory authority.

A useful NSC process develops options, identifies disagreement, tests assumptions, coordinates agencies, and records decisions. State may emphasize diplomatic consequences, Defense operational feasibility, intelligence officials uncertainty and threat information, and Treasury the administration of sanctions. Bringing those perspectives together helps the president see tradeoffs that one department might miss.

Presidents organize the process differently. Formal meetings and written papers can clarify alternatives and responsibility but may slow urgent action. Small groups can protect secrecy and speed, yet they may exclude expertise or encourage groupthink. NSC staff can follow up across agencies, but implementation still depends on lawful orders, funds, personnel, and cooperation in the operating departments.

Suppose the president considers sanctions after a foreign cyberattack. NSC staff can assemble intelligence, diplomatic, defense, and economic options. If Congress authorized the sanctions program, the Treasury Department may hold the legal authority and systems needed to designate targets and enforce restrictions. The NSC coordinates the choice; Treasury implements the lawful instrument.

On an exam, interagency national-security options point toward the NSC. Operational military command points toward the president and chain of command. Diplomacy, intelligence collection, sanctions administration, and appropriations point toward the officials or institutions assigned those functions. Coordination is a mechanism for decision quality, not a new source of legal power.

Video lesson: How Presidents Govern: Crash Course Government and Politics #14