Rosner unintentionally hit on a major point that has been left out of the Iraq discussion by almost all involved - the possibility of a U.N. presence.
Right now, the U.N. would not have fit in well in Iraq. We've been on a war footing, and peacekeeping units are designed to move in only when a political "peace" has been established. But, in the event of a pullout, (which will inevitably precipitate some degree of increased chaos), we really should consider giving them a call.
First, lets get the obvious out of the way. Bush isn't going to do any such thing. He won't even use the letters U and N in the same sentence. We're in Iraq til he moves out and the next President assumes the difficulties of getting us out of there. Secondly, we all have heard about how poor U.N. peacekeeping forces are at actually keeping the peace. They are not a cure-all, but their presence in conflict-ridden areas does have a positive effect, and its better than nothing.
Any practical plan for pullout will be both gradual, and will leave residual US forces to fight terror cells in smaller, more focused combat missions. Peacekeepers could serve as a helpful security force to allow for continuing efforts at political reconciliation in Iraq, as well as giving remaining US troops breathing space for anti-terror actions.
In short, our withdrawel cannot be as unilateral as our invasion was. We need to reach out to the U.N., and hopefully NATO as well, for the extra manpower necessary to lessen the severity of what will no doubt be a bad situation. So hopefully we can elect someone with the international chops to negotiate a resolution, bring in allies, and get the Iraqi government to cooperate with any such plan. It may sting to have to ask for help, but what do we have to lose that we haven't already?