[Peelod]

http://en.wikipedia.org/wiki/Posse_Comitatus_Act

The Posse Comitatus Act and the Insurrection Act substantially limit the powers of the federal government to use the military for law enforcement.

The Posse Comitatus Act is a United States federal law (18 U.S.C. § 1385) passed on June 16, 1878 after the end of Reconstruction. The Act prohibits most members of the federal uniformed services (the Army, Air Force, and State National Guard forces when such are called into federal service) from exercising nominally state law enforcement, police, or peace officer powers that maintain “law and order” on non-federal property (states and their counties and municipal divisions) in the former Confederate states.

The statute generally prohibits federal military personnel and units of the National Guard under federal authority from acting in a law enforcement capacity within the United States, except where expressly authorized by the Constitution or Congress. The Coast Guard is exempt from the Act.
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[oldleft]

I recall Bush mentioning posse comitatus as the reason why the military wasn’t used immediately after Katrina.

[Doomonyou]

The statute generally prohibits federal military personnel and units of the National Guard under federal authority from acting in a law enforcement capacity within the United States...

They will be part of homeland security, charged with making Amerika safe by disarming the masses.