Bush successfully isolated the Taliban, identifying them as the enemy rather than the people or state of Afghanistan.
He has been intent on doing the same in Iraq. Our target is quite obviously Saddam -- and only Saddam (along with those who willingly do his bidding). No other part of the Iraqi state or its institutions have been threatened; indeed, they have been encouraged.
The key to the mission will be to isolate Saddam from those in command of his WMD...
There was a report somewhere here yesterday that said Saddam had moved the Republican Guard out of Baghdad because he was afraid if we attacked, they would turn on him.