Iraq’s biggest Sunni political bloc committed itself on Sunday to talks with Shi’ites and Kurds to form a government of national unity, but said its key demands, including changes to the constitution, must be met. The United States, keen to drive the political process toward a stable consensus, wants the Kurds and majority Shi’ites, who dominated last month’s elections, to form a government that includes minority Sunnis. It hopes an inclusive coalition will undermine the raging Sunni Arab insurgency. Full Story