At some point the government will have to begin paying for these wars—if it can. What looks increasingly like a serious recession, complicated by an expensive federal bailout of financial institutions, may combine to convince even John McCain that the time has come to declare a victory and head for home. It's possible. But the United States did not acquire a $9 trillion national debt by caution with money. A decision to back out of the war is going to require something else—resolve backed by a combination of arguments that withdrawal won't be a victory for al-Qaeda or Iran, that it isn't prompted by fear, that it doesn't represent defeat, that it's going to make us stronger, that it's going to win the applause of the world, that the people left behind have been helped, and that whatever mess remains is somebody else's fault and responsibility.
Missing from this list is victory—the one thing that could make withdrawal automatic and easy. Its absence makes the decision an easy one for McCain—no victory, no withdrawal. But everybody else needs to think this matter through the hard way, trying to understand the real consequences of easing away from a bloody, inconclusive war. After six and a half years of fighting in Afghanistan and Iraq, the Democratic candidates for president and the public weighing a choice between them have a moment of relative quiet, right now, with the primaries nearly over and the nominating conventions still ahead, to consider where we are before deciding, to the extent that presidents or publics ever do decide, what to do.
The article is on the long side, but well worth the effort and investment of your time.