I think of this every time I hear some blowhard say we ought to partition that country and split it into three. That train has left the station. If we wanted to do that we could have back in 2003. As it stands now, unless we want to militarily reoccupy and start over, they have a right to their opinion.
I've never understood the partition idea. Would cause more problems than it's worth frankly. After all, one would think the lesson had been learned by creating Iraq in the first place after WWI.
No, Iraq will create strong ties with Syria, possibly Iran as they begin devolving into a theocracy. Of course they'll have voted for it with their purple fingers so all those that claimed 'democracy is working' in Iraq will have nothing to complain about...