Ambassador of the United States
The overall supervisor of diplomatic activities in the United States is the Secretary of State. As of 2014, this is John Kerry.
Department of State
The electorate, or citizenry of said nation.
In 1961 the US ended diplomatic relations with Cuba.
Combatant commanders
An operations supervisor is someone who directs the activities of a company's department. An operations supervisor can be from a job of any kind to everything from restaurants to retail jobs.
combatant commanders
The President
relations
diplomatic
Cuba
The United States Marine Corps is responsible for security of diplomatic missions