It literally has to. It literally takes an act of Congress to do otherwise.
Read the Posse Commitatus law. It's inconvenient - but it has teeth.
Just some predictions....
Prediction #1: within the next 2 weeks Chertoff will be out as will Michael Brown.
2. Within the next week the MSM will take and tout a poll, trumped up as it may be, showing Bush's numbers lower than ever
3. The LA state and local officials will recieve virtually no blame from the MSM, but there will be a massive voter retaliation in 2006.
4. Bush's visit today will seem successful to those on the ground, the MSM will look for and find, footage of a victim complaining about the president. This footage will be shown more than footage of the president himself for the next few days.
5. Within 2 months a Dimocrat with alot of clout will begin impeachment hearings.
6. Bush will be fighting for his political survival for the next year, but the Republicans will pick up seats in 2006.
7. Bush's numbers will rise about two months before Nov 2006 on the basis of a largely recovered economy, a good deal of progress in rebuilding NO, and an increasingly robust economy
Thank you for that. Now I understand the "why's" of the military getting involved.