We will do it some time.
Whether a Republican or Democrat is in office makes no difference. We will not achieve stability there in your or my lifetime. But we will bring the troops home. And yes, our enemies will cheer.
This is just the way things work. They have nothing to do with what anybody wants. If we had any brains in our heads, we would have known it going in. (Well, some of us did know and we did try to warn you.)