Russia
Cuba, Libya, Iran, and North Korea are the only countries not to have diplomatic relations with the US.
Cuba.
In 1961 the US ended diplomatic relations with Cuba.
The first country to recognize the United State was Morocco
relations
Cuba.
Cuba and the United States do not maintain diplomatic relations, and don't extradite.
1933
Yes they can. The US maintains diplomatic relations with Myanmar as well as MANY other Communist countries.
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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.