The Senate must approve.
He has an ambassador of foreign affairs.
Ambassador is a representative of the President to other nations.
The President.
George H. W. Bush was the tenth US Ambassador to the UN.
Elanor Roosevelt.
In the United States, the Department of State has ambassadors represent the the US to other nations. The US president appoints the Secretary of State and plays a role in the selection of senior foreign service officials.
The president is the officer of the US government that recognizes the government of other nations. The president also appoints ambassadors to represent the US in the recognized nations. The US Senate approves the appointment.
When she was married to Prince Charles, yes. Everytime she went abroad on state visits to foreign nations in the capacity as a royal of Britain it was in a way an ambassador role.
As of the 27th of October 2014, Charles Flanagan is Ireland's Minister for Foreign Affairs and Trade.
It could be either the President, Vice President, or Secretary of State.
Congress
Arthur J. Goldberg