What follows is the most succinct summation of the current situation in Iraq that I've come across. From The Washington Post
Last month, in the city of Fallujah in Anbar province, once the nexus of the Sunni insurgency, the newest political player emerged. Leaders of al-Nassir Salah al-Din Army, a Sunni militant group, declared they would renounce violence and form a political party called the National Front of Iraq's Liberals to compete in elections. "We found out that armed action will not get the United States out of Iraq," said Majid Ali Enad, the group's leader. "After five years of directing painful blows to them, they did not budge from a single meter in the country."