Article IV, Section 3, Clause 2 of the Constitution states: "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." (Emphasis added.)
The FedGov is not the United States.
I’m not here to argue about it, I honestly don’t care much about this issue beyond “they probably control too much of the land”.
You can send your hate mail to these liberals.
http://www.heritage.org/constitution/#!/articles/4/essays/126/property-clause