Any citizen can challenge their detention before a judge per the Hamdi case.
The MCA was needed because SCOTUS ruled wrongly in the Hamdan case. Because of that the law was carefully crafted by Republican moderates like Sen .John Warner John McCain and Lindsey Graham .
The MCA applies only to "alien unlawful enemy combatants" and does not apply to U.S. citizens However, non-citizen U.S. residents, including green card holders, can be designated as alien unlawful enemy combatants.
The MCA passed the Senate, 65–34 and in the House, 250–170–12 .The President signed the bill. Ok How is this in any way the President seizing any power at all ? If the law is flawed then I'm sure it will go through the standard judicial review.
Habeas Corpus has never applied to enemy combattants illegal or otherwise. The biggest problem that I see with all of this is the emphasis on justice and trials which means that the Administration is moving back toward treating Islamic terrorism as a crime rather than an act of war.
The above post by Paul Starr cracks me up . While the cassandras continue to decry President Bush they continue to compare him to some of the greatest Presidents in our history. I guess he keeps good company.