The only viable strategy, then, may be to correct the historical defect and move in stages toward a three-state solution: Kurds in the north, Sunnis in the center and Shiites in the south.
Almost immediately, this would allow America to put most of its money and troops where they would do the most good quickly — with the Kurds and Shiites. The United States could extricate most of its forces from the so-called Sunni Triangle, north and west of Baghdad, largely freeing American forces from fighting a costly war they might not win. American officials could then wait for the troublesome and domineering Sunnis, without oil or oil revenues, to moderate their ambitions or suffer the consequences. …
Obama likes Biden-Gelb ‘Soft Partition’ Plan
Iraq crisis discussion with Robin Wright and Les Gelb, President Emeritus of the Council on Foreign Relations