States, with Congressional approval, can enter into agreements with other states to form an agency to regulate a shared resource.

Federalism
or
Popular Sovereignty

Answer :

Answer: Federalism is the most likely answer

Explanation:Federalism is a mixed or compound mode of government that combines a general government (the central or "federal" government) with regional governments (provincial, state, cantonal, territorial or other sub-unit governments) in a single political system

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