The New York Review of Books is a treasure trove of goodies and like Forrest Gump's chocolate box, you never know what you are going to pull out. The present edition has a marathon book review-bibliography of the wars in Iraq and Afghanistan by Thomas Powers, entitled: "Iraq: Will We Ever Get Out?", where, after an exhaustive review of ten books on the subject he comes to the following conclusion:

There is a working assumption among the American people that a new president enters the White House free of responsibility for the errors of the past, free to set a new course in any program or policy, and therefore free—at the very least in constitutional theory, and perhaps even really and truly free—to call off a war begun by a predecessor. No one would expect something so dramatic on the first day of a new administration but it remains a fact that the president is the commander in chief of the armed forces, and the power that allowed one president to invade Iraq would allow another to bring the troops home.

Barack Obama and Hillary Clinton in the current presidential campaign have promised to do just that—not precipitously, not recklessly, not without care to give the shaky government in Baghdad time and the wherewithal to pick up the slack. But Obama and Clinton have both promised that the course would be changed on the first day; ending the American involvement in the Iraqi fighting would be the new goal, troop numbers would be down significantly by the middle of the first year, and within a reasonable time (not long) the residual American force would be so diminished in size that any fair observer might say the war was over, for the Americans at least, and the troops had been brought home.

The presumptive Republican candidate, John McCain, has pledged to do exactly the opposite—to "win" the war, whatever that means, and whatever that takes. Politicians often differ by shades of nuance. Not this time. The contrast of McCain and his opponents on this question is stark, and if they can be taken at their word, Americans must expect either continuing war for an indefinite period with McCain or the anxieties and open questions of turning the war over to the Iraqi government for better or worse with Obama or Clinton. Which is it going to be?

Getting out of Iraq will require just as much resolution as it took to get in—and the same kind of resolution: a willingness to ignore the consequences. The consequence hardest to ignore will be the growing power and influence of Iran, which Bush has described as one of the two great security threats to the US. Israel shares this view of Iran. No new president will want to run the risk of being thought soft on Iran. This is where the military error exacts a terrible price. A political conflict transformed into a military conflict requires a military resolution, and those, famously, come in two forms—victory or defeat. Getting out means admitting defeat.

Is it possible that the new president will have that kind of resolution? I think not; to my ear Clinton and Obama don't sound drained of hope or bright ideas, determined to cut losses and end the agony. Why should they? They're coming in fresh from the sidelines. Getting out, giving up, admitting defeat are not what we expect from the psychology of newly elected presidents who have just overcome all odds and battled through to personal victory. They've managed the impossible once; why not again? Planning for withdrawals might begin on Day One, but the plans will be hostage to events.

At first, perhaps, all runs smoothly. Then things begin to happen. The situation on the first day has altered by the tenth. Some faction of Iraqis joins or drops out of the fight. A troublesome law is passed, or left standing. A helicopter goes down with casualties in two digits. The Green Zone is hit by a new wave of rockets or mortars from Sadr City in Baghdad. The US Army protests that the rockets or mortars were provided by Iran. The new president warns Iran to stay out of the fight. The government in Tehran dismisses the warning. This is already a long-established pattern. Why should we expect it to change? So it goes. At an unmarked moment somewhere between the third and the sixth month a sea change occurs: Bush's war becomes the new president's war, and getting out means failure, means defeat, means rising opposition at home, means no second term. It's not hard to see where this is going.

We are committed in Afghanistan. We are not ready to leave Iraq. In both countries our friends are in trouble. The pride of American arms is at stake. The world is watching. To me the logic of events seems inescapable. Unless something quite unexpected happens, four years from now the presidential candidates will be arguing about two wars in Iraq and Afghanistan, one going into its ninth year, the other into its eleventh. The choice will be the one Americans hate most—get out or fight on.