Well alrighty then. So you want to go with the Obama solution of announcing a date when we will be out and giving our enemies hope that they can wait us out? Yeah that always works! Genius!
Negotiation has many meanings. One form is merely to humiliate your enemy enough so that they just go looking for an easier way to live their miserable lives other than continuing to continue to cause problems. But obviously in this situation we have a bunch of adversarial groups which all need to be dealt with in what ever way is appropriate.
We don't have just the Taliban and Isis as players. We also have numerous local groups in Afghanistan, and Pakistan, not to mention groups from other countries in the region such as Iran. In this region the only thing that is truly understood is strength and resolve.
I don't think that you get that. Or maybe you just want to over-simplify to be adversarial to the actions of our Commander in Chief?