That says Congress in in control of disposing of new territories. It doesn’t say it’s supposed to keep control of them.
And, by the way, Congress has permitted its power to be usurped by the Executive....the Interior Deptmt and the BLM.
Wouldn't that fall under the "... and make all needful Rules and Regulations respecting the Territory or other Property belonging to the United States..." part of the clause?
And, by the way, Congress has permitted its power to be usurped by the Executive....the Interior Deptmt and the BLM
They gave the BLM the authority to manage the lands in 1976. They didn't give them permission to sell it.