The electorate, or citizenry of said nation.
Ambassador of the United States
Department of State
The US switched diplomatic recognition from Taiwan to China in 1979 following the Joint Communiqué on the Establishment of Diplomatic Relations. This move was part of the US government's effort to recognize the People's Republic of China as the sole legal government of China.
Diplomatic
Diplomatic, Informational, Military and Economic
Commander and Chief (president of the US) or The Secretary Of Defence.
The general public would not have access to that information. Diplomatic couriers work for government departments, and as such need a certain amount of anonymity.
George Bush
In 1961 the US ended diplomatic relations with Cuba.
the korean war
diplomatic relations with other countries
The People's Republic of China was recognized by the US on January 1, 1979 as the sole legal government of China. The recognition established the diplomatic relations of the two countries. This was an accomplishment of President Jimmy Carter.