During the past month, I've been slightly frustrated because the polling data from Rasmussen has shown Bush's approval in the upper 40's, down only a tick from before Katrina. While the polling data from other agencies has been encouraging, Rasmussen seemed to be indicating that Bush's approval hadn't really been affected.
The other polling agencies numbers have been encourageing, but I've long since decided that Rasmussen's is the most accurate. They use an automated poll, with the questions identical from day to day. Since they poll every single day, I think that it is probably the most representative. No matter what, it is certainly easier to compare a Rasmussen poll today to one taken two months ago, than it is to compare an AP poll today to a Strategic Vision poll 2 months ago.
Anyway - Rasmussen finally is showing a pretty significant drop in Bush's numbers. He's at 44% today.
http://www.rasmussenreports.com/Bush_Job_Approval.htm
And Rasmussen seems to point out what many here alreay have suggested, that the drop in Bush's numbers is due to GOPers running from Katrina spending. He says that conservatives are "not enthusiastic" about the spending.
Good news, IMO...