Michael Crowley has an essay in The New Republic on whether a President Obama would actually withdraw U.S. troops from Iraq. The key paragraph:

The truth is Obama has no secret plan for Iraq. Interviews with nearly two dozen foreign policy and military experts, as well as Obama's campaign advisers, and a close review of Obama's own statements on Iraq, suggest something more nuanced. What he is offering is a basic vision of withdrawal with muddy particulars, one his advisers are still formulating and one that, if he is elected, is destined to meet an even muddier reality on the ground. Obama has set a clear direction for U.S. policy in Iraq: He wants us out of Iraq; but he's not willing to do it at any cost--even if it means dashing the hopes of some of his more fervent and naïve supporters. And, when it comes to Iraq, whatever the merits of Obama's withdrawal plan may be, "Yes, We Can" might ultimately yield to "No, we can't."

Anyone who tells you they have a foolproof Iraq plan to put in place nine month from now is lying to you.