if the question is: "does the constitution provide for the federal government to own and administer the physical real estate of which these united states are comprised?'", the answer is very clearly spelled out in the second paragraph of article vi, section 3:
"The Congress shall have Power to dispose of and make all needful Rules and Regulations respecting the Territory or other Property belonging to the United States; and nothing in this Constitution shall be so construed as to Prejudice any Claims of the United States, or of any particular State."
as rarely as i agree with leauki about anything, his reasoning and conclusion in response to this question was correct in contrast to the rebuttal offered by two 'america love it (even if you don't have a clue about it) or leave it' patronizing patriots talking nonsense thru their uncle sam hats.
it would be amusing if it weren't so sad.