Who to blame?

Conason:

George W. Bush now promises that he will uncover the truth about the government’s lethally inadequate response to Hurricane Katrina. “What I intend to do,” he told the White House press corps after his second hurried visit to the ruins of New Orleans, “is lead an investigation to find out what went right and what went wrong.”
Finding out what went right won’t take very long, and it’s a task that the President can certainly accomplish in his own style. He has often demonstrated that he knows how to heap praise on himself, his administration and his appointees regardless of the merits.

Heh. The old fallback position won't work this time.

... [H]aving asked Bill Clinton for help, Mr. Bush can’t play the blame game with the former President. Besides, politicians of both parties have long acknowledged that Mr. Clinton rebuilt FEMA by naming the highly competent and qualified James Lee Witt to run the agency.