Paul Bremer clarifies his "not enough troops" comment:

It's no secret that during my time in Iraq I had tactical disagreements with others, including military commanders on the ground. Such disagreements among individuals of good will happen all the time, particularly in war and postwar situations. I believe it would have been helpful to have had more troops early on to stop the looting that did so much damage to Iraq's already decrepit infrastructure. The military commanders believed we had enough American troops in Iraq and that having a larger American military presence would have been counterproductive because it would have alienated Iraqis. That was a reasonable point of view, and it may have been right. The truth is that we'll never know.

But during the 14 months I was in Iraq, the administration, the military and I all agreed that the coalition's top priority was a broad, sustained effort to train Iraqis to take more responsibility for their own security. This effort, financed in large measure by the emergency supplemental budget approved by Congress last year, continues today. In the end, Iraq's security must depend on Iraqis.

Makes sense to me. The logic for both points of view makes perfect sense, and like Bremer, none of us knows which would have been a better choice.