The Constitution is clear. Only a liar says it authorizes the federal government to take and/or manage property within the United States for reasons other than “the seat of the government, forts, magazines, arsenals, dockyards, and other needful buildings”. Of course, “other needful Buildings” is not specific. However, sane people understand that the Constitution is talking about either military use (military bases) or the buildings necessary to fulfill the other federal duties (post offices).
Wrong. The Constitution quite clearly says that "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." With a couple of exceptions, the western states were formed out of territory belonging to the United States. Most of that land was never relinquished by Congress. It still belongs to the United States, and Congress still has constitutional authority to regulate it.
Wrong. The Constitution quite clearly says that "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." With a couple of exceptions, the western states were formed out of territory belonging to the United States. Most of that land was never relinquished by Congress. It still belongs to the United States, and Congress still has constitutional authority to regulate it.