While the theory is very clear in your head, you haven't reduced it to a form that I grok. You said, referring to Blanco's Aug 27 letter:
SPECIFICALLY MISSING FROM THIS REQUEST ARE THE FOLLOWING PARISHES: JEFFERSON, PLAQUEMINES, ST. BERNARD, AND ORLEANS.
And I cited that letter and gave a link to it, and you are correct as to the situation on Saturday, August 27th. But, those very parishes ARE named in her letter of August 28, which ws composed before the hurricane hit (before there was a disaster).
Parishes expected to receive major damage based on the anticipated track of Hurricane Katrina are: Ascension, Assumption, Jefferson, Lafourche, Orleans, Plaquemines, St. Bernard, St. Charles, St. James, St. John, St. Tammany, Terrebonne, and Washington.
I post the above not to argue that Blaco is competent in handling disaster relief, but merly to promote an accurate presentation of the factual record.
The key letter is the one from Louisiana dated August 27. Not the "CYA" letter of August 28.
And I'm not actually convinced it really was written on 8/28, but I can't prove that it wasn't. So far...