Just about everyone.
Go to the Code of Federal Regulations and look up the definition of United States. The majority of the time, it's defined as Washington D.C., American Samoa, the Virgin Islands and Alaska and Hawaii before they became states.
Article 1, Section 8, Clause 17
To exercise exclusive Legislation in all Cases whatsoever, over such District (not exceeding ten Miles square) as may, by Cession of Particular States, and the Acceptance of Congress, become the Seat of the Government of the United States, and to exercise like Authority over all Places purchased by the Consent of the Legislature of the State in which the Same shall be, for the Erection of Forts, Magazines, Arsenals, dock-Yards, and other needful Buildings;--
Anything inside that geographic limitation and with the exception of property OWNED by the Federal government in other states is all the 'United States' consists of. Everything else is just a 'State' and should be populated with AMERICAN NATIONALS not 'United States Citizens'.
That is just a definition used in the CFR. That definition in no way limits the Constitutional jurisdiction of the United States.
Everything else is just a 'State' and should be populated with AMERICAN NATIONALS not 'United States Citizens'.
Utter nonsense. What is the difference between an American National and a United States Citizen? There is no such thing as a citizen of a State, only of the US.