Not sure why you are having such a hard time with this issue unless you are hell bent on trying to pin everything on Bush while absolving the governor and mayor.
From all I've seen I believe
1) the mayor requested aid but may not have had the experience and background to request what he needed and how to request it.
2) The governor was woefully inadequate and may have had her own "hangups" about how and when to request aid. There were comments made where she showed she was strongly against having any federal troops deployed in the area. I personally believer the governor and her administration which would also comprise a key component of the fema relief effort were woefully inadequate to the point of suicidal incompetence.
3) What stands out in my mind is the frustrated mayor saying someone has to get off their but and do something. What to me became clearly apparent was the deployment of troops and relief effort eventually appeared to completely bypass the governor and her administration as Bush and the feds developed a more effective working relationship directly with the mayor. As the federal relief effort became more effective it was clearly evident that the governor was being pushed to the background to the point where she almost disappeared. I still remember the influence of the cayenne general (Dupree?)who led the military relief effort. His name escapes me but what does stand out is this person for all intents and purposes becoming the governor of Louisiana when he basically coached the beleaguered governor on how to do her job. How to stand up and lead in a time of crisis , what to say and what to do.
You really need to take a look at how the characters played out in this one. All 4 were standing there with their pants around their ankles on Katrina plus one. I believe what you then saw develop was a period where the 4 struggled to mesh. Followed by a period where The true leaders slowly pushed their way to the front. Bush and the mayor. While the mayor was woefully inexperienced he knew how to lead people.
The governor disappeared. Her style of leadership was reminiscent of Hussein hiding in a hole in the ground.
Brown I'm not sure about. Brown was the head of Fema the previous year when Florida got hit by one major hurricane after another and yet did a fairly decent job. Katrina hits and all of a sudden the guy is a schmuck who does not know what he is doing. What was the difference between Florida and Louisiana? Clearly strong leadership by the governor and the state response team who's job it is to assess the damage and request whatever federal aid was needed. Its also possible that Browns biggest shortcoming may have been that he did not know how to overcome an incompetent governorship in doing his job.
A script that was very effective in Florida and Alabama was suddenly woefully ineffective in Louisiana.
To try to make the point that Bush was negligent because he was more concerned about taking his vacation is a very naive assessment of what is in fact much more complex then you try to sell it. For someone who claims to do your homework you took a very shallow position here. Presidents don't take true vacations. He may be in Crawford Texas but he is still working as the president. The handling of a hurricane event has always been managed by Fema and the governorship of the state. The presidents public role has always been to pledge support, do the fly through 4 or 5 days later and request congressional spending and support. To try to make the case that Bush should have canceled his vacation and personally led the relief effort on day one is to willfully try to hold Bush to a standard that no other president has ever been held to.
Sit back and do some hard thinking about the roles off all 4 as you slow cook those ribs. A federal relief effort will not be effective if you do not have the local infrastructure in place to allocate those resources where needed. The governor should have hopped into a helicopter on day one seen the flooding, seen the bodies floating in the water and the people on the roofs. At that point any simpleton should could have realized that they did not have the resources to meet this challenge. Any simpleton with staff could have figured out and requested federal miliatary support immediately. Why then did it take her and her staff so long to finally begrudingly request that help?