Why Does Obama Want to Extend a War He Doesn’t Believe In?

Why Does Obama Want to Extend a War He Doesn’t Believe In? | Common Dreams: 

"Did Obama personally believe the war was a lost cause throughout this time? Did he sign each letter of condolence to the families knowing that the loss was for naught?
There are more immediate implications as well. The White House is strongly pushing for a long-term security agreement with Afghanistan that could keep as many as 15,000 US troops in the country to “2024 and beyond.” These troops would still be allowed to engage in combat missions. In other words, the longest and least-popular war in American history would drag on.
Is this happening despite the commander in chief himself being one of the 82 percent of Americans who opposes the war? How can that be?"