Nor have I, and I am doubtful he did so. But, as the article says, that is not the point.
The point is not that the administration is necessarily guilty of misbehavior, but that it should be forced to defend its decisionmaking process.
If they made bad judgements, or made errors, it should be examined. I don't need to know the details of how decisions were made, but we ought to have some confidence it is less likely to happen again. Just saying, "Opps, sorry, we'll do better next time" is not enough when we are talking about Americans dying in combat.
The worst thing Bush or any politician can do is act like they're hiding something. He should just come out and say mistakes were made regarding information given to him and let the chips fall where they may. Saddam was a terrorist and there was good reason to take him out anyway.
If he doesn't put a stop to it, the democrats, and the Cato Institutes of the world will beat him over the head with it forever, and what I'd really hate to see is political fallout that affects House races.