"Mr. Obama has offered a sensible blueprint for quickly drawing down American troops in Iraq and bolstering the fight in Afghanistan. After a befuddling silence, Mr. McCain on Tuesday finally agreed that more troops are needed in Afghanistan. What Mr. McCain has yet to explain is where those troops will come from.

Mr. Bush’s disastrous war in Iraq has so overtaxed American forces that the math is painfully simple: Until there is a real drawdown from Iraq, there will not be enough troops to win in Afghanistan. "