Tyler Cowen Leans Toward Partition.
Unfortunately, the chances for peaceful partition (to the extent they ever existed) are rapidly receding. The best window of opportunity was shortly after the defeat of Saddam when the situation was in flux. Today, partition would be much more difficult to achieve because leaders of the Shi'ite majority are so puffed up with dreams of monopoly power (either through all Iraq elections or by force) in a unified Iraqi nation state.
As Iraq spirals into renewed factionalism, violence, and increased distrust of the U.S. (all worsened by the continued presence of our troops), any option is riddled with numberless potential unintended consequences. The best remaining hope for both Iraq and our national defense is for the US to withdraw as soon as possible from this mess.....though I suspect that Tyler (who supported this war) is not ready to agree!