Article 1 Section 8 Sub 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;
And
To make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by this Constitution in the Government of the United States, or in any Department or Officer thereof.
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The words by the CONSENT of the legislature of the State is very clear in the above.
Next question, was 86% of Nevada annexed by the USA with the consent of the State legislature of Nevada when Nevada entered statehood?
Holding on to ownership of that land is not within Federal authority. Unless you can find a clause that allows the Fedgov to hold on to territory after it gains Statehood?
Amd 10 would seem to argue against that interpretation.
And yes, I’m aware there was already a 9th Circuit court case along these lines. US Vs Gardner. There, they used Art 4 sec 3 to say it was ok for the Feds to own most of an established State.
They are wrong. But the 9th is kinda known for that.