A US intelligence official says that the US could have prevented the Taliban's quick victory by keeping certain intelligence teams going. However, Biden could not do this while keeping the agreement (made by the wrecker) to withdraw all the US troops.

If Biden had kept those teams going, would that have prolonged the war? I don't know, but I have a feeling that that could only have occurred if the US had continued pouring in money. There would still have been no chance to defeat the Taliban.