Understand your levels of government. The Federal government intervened in Little Rock because the Governor would not enforce FEDERAL law. Local emergencies are a function of STATE government, and as such are handled by the state. Under what FEDERAL law do you suppose Bush would have been justified in using to intervene ?
The President has the right to protect the general welfare of the citizens. Also, the Port of New Orleans is the nation's largest in terms of throughput and about 20% of our energy needs come from this area.
Reagan fired the air traffic controllers and HST seized the coal mines in 1946. NO is part of our national security.