Might be one of the "two options" Nagin said Bush gave Blanco.
The other was to get competent help.
"..Later that day, Bush administration officials sent Blanco a legal memo seeking to federalize Louisiana law enforcement under the Insurrection Act, which is used to suppress civil disobedience that threatens to turn into anarchy. The act would clarify the chains of command of local, state and federal agencies with the president in charge.
Rather than cede control, Blanco on Saturday morning named James Lee Witt, who ran the Federal Emergency Management Agency under Clinton, to help run relief efforts..."