The Military Commissions Act‘s stated purpose is:
“To authorize trial by military commission for violations of the law of war, and for other purposes.”
According to Wikipedia: This bill redefines unlawful enemy combatant in such a broad way that it refers to any person who is
engaged in hostilities or who has purposefully and materially supported hostilities against the United States.
This makes it possible for US citizens to be designated unlawful enemy combatant because
it could be read to include anyone who has donated money to a charity for orphans in Afghanistan that turns out to have some connection to the Taliban or a person organizing an anti-war protest in Washington, D.C.
As such habeas corpus may be denied to US citizens.
Remember, too, that in the 2006 Military Commissions Act, Congress stripped from all these prisoners any meaningful right to utilize our federal courts, thereby defying our own Supreme Court. – Nat Hentoff (Villiage Voice)
Patrick Leahy, United States Senator, commented about the Act:
“Passing laws that remove the few checks against mistreatment of prisoners will not help us win the battle for the hearts and minds of the generation of young people around the world being recruited by Osama bin Laden and al Qaeda. Authorizing indefinite detention of anybody the Government designates, without any proceeding and without any recourse—is what our worst critics claim the United States would do, not what American values, traditions and our rule of law would have us do. This is not just a bad bill, this is a dangerous bill.“