No state power is more fearsome than the power to imprison. Hence the habeas right has been at the heart of the centuries-long struggle to constrain governments, a struggle in which the greatest event was the writing of America's Constitution, which limits Congress's power to revoke habeas corpus to periods of rebellion or invasion. Is it, as McCain suggests, indefensible to conclude that Congress exceeded its authority when, with the Military Commissions Act (2006), it withdrew any federal court jurisdiction over the detainees' habeas claims?I'm sympathetic to the need to keep some of these bozos locked up more-or-less permanently. However, there was a really simple way to do that from the beginning: They should have been declared prisoners of war, with rights per the Geneva Convention. The Bush Administration has only itself to blame for getting too cute by half.
As the conservative and libertarian Cato Institute argued in its amicus brief in support of the petitioning detainees, habeas, in the context of U.S. constitutional law, "is a separation of powers principle" involving the judicial and executive branches. The latter cannot be the only judge of its own judgment.
In Marbury v. Madison (1803), which launched and validated judicial supervision of America's democratic government, Chief Justice John Marshall asked: "To what purpose are powers limited, and to what purpose is that limitation committed to writing, if these limits may, at any time, be passed by those intended to be restrained?" Those are pertinent questions for McCain, who aspires to take the presidential oath to defend the Constitution.
The risk with government by obfuscation is that somebody may come along and clarify things for you.