An article by a Forum member on National Interest website, that ends with:
If negotiations yield a long-term ceasefire and a window for a U.S. withdrawal, President Trump should leap at the chance to bring the remaining 14,000 American troops home. There are other actors in the region—Russia and Iran foremost among them—who have a vested interest in keeping the Taliban from dominating Afghanistan. If Afghanistan does revert to the control of a hostile theocracy, we retain the ability to return and punish or even overthrow a regime as quickly as we did in 2002. U.S. security policy in Afghanistan should be governed by “butcher and bolt,” not “you break it, you buy it.”
Link:https://nationalinterest.org/blog/middle-east-watch/can-trump-get-america-out-afghanistan-26886

For the USA I see the issues of an exit is intensely political. This is in part due to this being a 'Long War', with all the sacrifices made and the belief the 9/11 attackers came from Afghanistan - not Hamburg and Saudi Arabia. Yes they were inspired and aided by AQ in Afghanistan.

Long ago there was the US exit from South Vietnam, under a Republican President.


It does seem strange that "butcher and bolt" is the best course. Which of course is what the British decided was the best policy in the Imperial era.

If you look at the Soviet exit that was negotiated and passed off without attacks. Few expected Najibullah to hang for years. Will the GIRoA stay at home or seek refuge abroad - not next door, further afield?