Even those on the left have a lucid thought here and there:
The fetid aroma of hindsight - Los Angeles Times

Obviously — obviously in hindsight, that is — we should have spent the money to strengthen the New Orleans levees. President Clinton should have done it. Presidents Bush the Elder and Reagan should have done it. As Tim Noah notes in Slate, warnings about the perilous New Orleans levees go back at least to Fanny Trollope in 1832. In fact, the one president who is pretty much in the clear on this is our current Bush - not because he did anything about the levees but because even if he had started something, it probably wouldn’t have been finished yet.