Do you really think an admission and move on is all that should occur here. My republican side demands personal responsibility and an accounting including any appropriate and applicable punishments.
Well once you realize you've done something wrong . . . and you've been caught . . . you have several options:
1) Deny, deny, deny while portraying your accusers as "liars, propagandists, terrorists, or traitors" (the administration likes this one).
2) Bait and switch (Wolfowitz likes this one).
3) Modify your message . . . not really a bait and switch . . . just imply you acted in good faith but mistakes may have been made (administration will adopt this message soon).
4) Diversion: Empasize the positive . . . essentially #3 but instead of modifying original intent you point to the outcome as all the justification you need (this tactic is always useful).
5) Lay out all the facts in chronological order to justify the decision matrix and the assumptions which underlied specific actions (no one ever takes this route b/c the whole truth invariably contains something your enemies can use against you).
The Bush administration has some major complications in using any tactic other than 4 and 5:
1) The search for WMD has been unproductive. Even if UN findings were staged (Iraqis feigning compliance), they were infinitely more successful in finding WMD and destroying prohibited armaments than 250K US/UK troops.
2) It's not just an American political problem. Aznar and Blair in particular need proof to justify their actions. Italians have a borderline fascist for PM so they don't really care about truth. Eastern Europeans are used to being lied to by the government so recent events are par for the course . . . plus they got paid. Blair is taking fire from the Liberals, Labor, and the Tories.
3) Afghanistan is not going well . . . but we can blame it on the international peacekeepers and the lack of international financial support for Karzai's government. Iraq's occupation is not going horribly wrong but it's not a real success story, either. Unfortunately, there's no one to blame EXCEPT the US. We will make veiled and occasionally overt comments on the subpar infrastructure which existed before invasion but that only works with foreigners. Common Iraqis, Sunnis, and any Iraqi with skills and connections (essentially Ba'athist) will clearly exclaim that day to day life has gotten much worse.