Answer:
Part (a)
The president or Congress could take the following actions to strip the Supreme Court of jurisdiction in all habeas corpus petitions of all individuals being held at Guantanamo Bay:
- The president could issue an executive order that would declare that the Supreme Court does not have jurisdiction in these cases.
- Congress could pass a law that would explicitly strip the Supreme Court of jurisdiction in these cases.
The potential basis for such power would be the president's Article II authority as commander in chief, or Congress's Article I authority to make laws.
Part (b)
Such actions by the federal government would interfere with the separation of powers. The Supreme Court is the ultimate arbiter of the meaning of the Constitution, and stripping it of jurisdiction in these cases would effectively give the president or Congress the power to decide who is entitled to habeas corpus. This would be a significant expansion of executive or legislative power, and it would undermine the principle of checks and balances.
The constitutionality of such actions is a complex question. The Supreme Court has held that the president does have some limited authority to detain enemy combatants, but it is not clear whether this authority includes the power to strip the Supreme Court of jurisdiction in habeas corpus cases. Similarly, it is not clear whether Congress has the power to pass a law that would explicitly strip the Supreme Court of jurisdiction in these cases.