He thinks Blanco intentionally created the pandemonium in NO in order to either blame it on Bush or to force Bush to federalize the troops, at which time all the Dems would be screaming that he superceded the state's rights and calling for his impeachment.
Your husband is not the only one.
"They also allowed the disaster to get as bad as it could be in an attempt to force the President to overstep his authority in order to save lives. By using Blanco as a giant monkey wrench in the federal machine, sabotaging the federal effort and blocking all help, they tried to force Bush's hand into violating Posse Comitatus so they could impeach him. It's that simple."