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It all depends on how it is handled. The key must be a political settlement between the Taliban and the Afghan government and not the rapid withdrawal of U.S troops.
The president deserves credit for having authorized the negotiations in Doha between a special envoy, Zalmay Khalilzad, and the Taliban. The next step is for the talks to broaden to involve the Afghan government. The end result would be a national unity government that includes both the current Afghan government and the Taliban. It may sound far-fetched, but it could be achieved in phases, over time.