Iraq's political process remains stalled.

U.S. military commanders say a key goal of the ongoing security offensive is to buy time for Iraq's leaders to reach political benchmarks that can unite its fractured coalition government and persuade insurgents to stop fighting.

But in pressuring the Iraqis to speed up, U.S. officials are encountering a variety of hurdles: The parliament is riven by personality and sect, and some politicians are abandoning Prime Minister Nouri al-Maliki's government. There is deep mistrust of U.S. intentions, especially among Shiites who see American efforts to bring Sunnis into the political process as an attempt to weaken the Shiites' grip on power.

Many Iraqi politicians view the U.S. pressure as bullying that reminds them they are under occupation. And the security offensive, bolstered by additional U.S. forces, has failed to stop the violence that is widening the sectarian divide.

"The Americans should take into consideration the Iraqi situation and its complications, not just their own internal politics," said Mahmoud Othman, an independent Kurdish legislator.

Ten weeks into the security plan, even as U.S. lawmakers propose timelines for a U.S. troop withdrawal, there has been little or no progress in achieving three key political benchmarks set by the Bush administration: new laws governing the sharing of Iraq's oil resources and allowing many former members of the banned Baath Party to return to their jobs, and amendments to Iraq's constitution. As divisions widen, a bitter, prolonged legislative struggle is hindering prospects for political reconciliation ...