"Everyone wants me to solve their problems,"
Zalmay Khalilzad says as he adjusts his bulletproof vest and settles into the back seat of his armored SUV. The U.S. ambassador to Iraq has just emerged from a meeting at the sprawling riverside home of Abdel Aziz al-Hakim, who heads the coalition of Shi'ite parties that controls Iraq's incoming parliament. It didn't go well. For more than an hour, Khalilzad tried to persuade al-Hakim to help revive the Iraqi political process, stalled in part because the Shi'ites refuse to bend to demands by secular, Kurdish and Sunni parties that Prime Minister Ibrahim al-Jaafari...