The United States Mission to the United Nations is the formal title of the United States delegation to the United Nations (UN). Each nation at the UN has a similar delegation, although only a few are members of the UN Security Council. The United States Mission joined in the original founding of the UN, among 51 member states, under the United Nations Charter in 1945.
There are several major leadership roles in the US Mission. The primary role, United States Ambassador to the United Nations, is the leader of the U.S Mission to the United Nations. The position is more formally known by the exact title:
The position is also known as simply the US Permanent Representative, or "Perm Rep", to the United Nations.
The U.S. Permanent Representative, currently Nikki Haley, is charged with representing the United States on the UN Security Council and during almost all plenary meetings of the General Assembly, except in the rare situation in which a more senior officer of the United States (such as the U.S. Secretary of State or the President of the United States) is present. Like all United States ambassadors, he or she must be nominated by the U.S. President and confirmed by the Senate.
Many prominent U.S. politicians and diplomats have held the post, including Henry Cabot Lodge, Jr., Adlai Stevenson, George H. W. Bush, Daniel Patrick Moynihan, Dr. Jeane Kirkpatrick, Richard Holbrooke, Dr. Madeleine Albright, Bill Richardson and John Danforth.