Negative.
As a former National Guard soldier, I will tell you:
The president could not order troops into Louisiana over the heads of Blanco or any other states troops would be pulled from.
National Guard has both a state and federal mission.
When not activated for war, the governor acts as the commander of troops in his or her state.
BLANCO had the impetus to call them out, and FAILED TO DO SO.
It was not on the President to do her job.
And this isn't a matter of activating one single unit, you must activate supply and support units, transport, and other units as if you WERE going to war just to get supplies in and out of the area.
Again, it was on BLANCO to activate troops in her state.
Instead, she did a good job of being inept and incompetent.
or national emergency.
He could have formally declared one.