San Fran Chronicle:

But in several instances, Kerry attacked what he called the “horrendous judgments” and “unbelievable blunders” of the Bush administration. The mistakes, he said, included former U.S. occupation leader Paul Bremer’s decisions to disband the Iraqi army and purge the government of former members of Hussein’s Baath Party. Both moves are widely believed to have fueled the largely Sunni insurgency.
“What is sad about what’s happening here now is that so much of it is a process of catching up from the enormous miscalculations and wrong judgments made in the beginning,” he said. “And the job has been made enormously harder.”
He added, however, that it was time to move forward.