William Kristol offers his thoughts in the latest issue of Time:

There has been some sniping at the Keane-Kagan plan. But what is striking is that so few of the critics actually go to the trouble of analyzing it--or proposing a substitute. Instead, Keane and Kagan are treated with annoyance and disdain. Don't they know that we're losing in Iraq and that it's time to leave? What's all this talk about staying and fighting and winning? Didn't anyone tell them that the Bush Administration's errors have been so grievous that success is hopeless? The Bush Administration's errors in the execution of the war have, in fact, been grievous. But George W. Bush seems to believe this: If we make serious mistakes in executing a worthwhile task, then we should try to repair those mistakes (even if belatedly) and correct course rather than abandon our friends and desert the battlefield.