At issue--politically for McCain--is whether Afghanistan will become a topic of focus and debate during the general election. For years, Afghanistan has largely been the forgotten war. There has been not much opposition to it--and no contentious fights in Congress over funding for the military operations there. The situation on the ground has been on a low boil for years. Policy wonks and a small number of politicians have been warning of trouble in Afghanistan, but their naysaying has not drawn much media attention. And the broadcast and television networks devote little airtime to covering the fighting there. Within the punditry, there is far more talk of what the next president will do about Iraq than Afghanistan.

But if Afghanistan explodes--that is, enough to attract media coverage--will McCain find himself in the position of defending two messy wars? Obama will have to talk about his plans for Afghanistan, but if there is a campaign face-off over Afghanistan, he will possess the built-in, I-told-you-so advantage of having opposed the Iraq invasion. And trouble in Afghanistan will serve as a reminder to voters that George W. Bush screwed up this task, and that's not likely to enhance McCain's prospects.

U.S. troops have been fighting, killing and dying in Afghanistan for nearly seven years--a longer stretch than the time it took to fight the First World War, the Second World War or the Korean War. Yet the management of this war has not been no hot issue within the political-media world. Bush will leave office without having been held accountable for how he has handled (or mishandled) the war. Yet if developments in Afghanistan continue on the current course, that war might become one more piece of Bush baggage that McCain must carry.