I'm always amazed at how many Republicans can just lie to themselves about basic immutable facts.  Here's the latest example:

A significant chunk of Louisiana Republicans evidently believe that President Barack Obama is to blame for the poor response to the hurricane that ravaged their state more than three years before he took office.

The latest survey from Democratic-leaning Public Policy Polling, provided exclusively to TPM, showed an eye-popping divide among Republicans in the Bayou State when it comes to accountability for the government's post-Katrina blunders.

Twenty-eight percent said they think former President George W. Bush, who was in office at the time, was more responsible for the poor federal response while 29 percent said Obama, who was still a freshman U.S. Senator when the storm battered the Gulf Coast in 2005, was more responsible. Nearly half of Louisiana Republicans — 44 percent — said they aren't sure who to blame.

Benen has an explanation:

More Louisiana Republicans blame Obama than Bush for the response to Katrina, which obviously don't make sense, but I imagine if PPP asked, a non-trivial number of Louisiana Republicans would also blame the president for 9/11, Watergate, the Hindenburg disaster, the 1919 White Sox, and the U.S. Civil War.

That's probably true.  It's just blind outrage.