I faced a lot of criticism as president. I didn't like hearing people claim I had lied about Iraq's weapons of mass destruction or cut taxes to benefit the rich. But the suggestion that I was a racist because of the response to Katrina represented an all-time low. I told Laura at the time that it was the worst moment of my presidency. I feel the same way today.
pp. 325, Chapter 10: Katrina. - Decision Points (November 2010)