But to your specific question though, Donald Trump clearly was in this huge rush to both claim responsibility for withdrawing U.S. forces from Afghanistan, and also weirdly to have some kind of peace deal with the Taliban. And you will even remember he was talking about inviting them to Camp David for some big ceremony around the 9/11 anniversary, like that is a thing that actually happened. And the reality is efforts at diplomacy over the years were always predicated under successive administrations on the Afghan government being in the lead in any negotiation with the Taliban. You don’t negotiate your own exit with the adversary of the government that you are supporting. And that’s what the Trump administration did. They cut a deal with the Taliban that excluded the Afghan government, effectively again demoralizing them and making them feel like we were simply leaving them holding the bag entirely.

Source: Former Nat. Sec. Adviser Whacks Trump’s Botched Negotiation With Taliban | Crooks and Liars