The key difference, of course, is that Bush wasn't responsible for the damage Katrina caused.
Bush was all over the approaching storm, telling people to get out of the way and pleading with the idiot Louisiana Governor Kathleen Blanco to let FEMA in to get pre-positioned.
1. The idiot mayor of New Orleans, Nagin did nothing.
2. Blanco would not permit the Fed Gov in.
The traitorous media tried to hit Bush on this and in large measure succeded.
And Bush didn’t have 3+ years to plan for Katrina.