It is gratifying that finally the comparison between Afghanistan and Vietnam is being taken seriously. Read this.
However, the focus at the White House is still a little off if the obsession is about "strategy" and "military pressure".
What the White House must focus on is whether the war is justifiable in the first place and second whether it is in fact "winnable" in any meaningful sense when the people and the government you want to "save" are in fact on your side for the same reasons you are.
Right now Kabul without US will fall in days because the people do not support it.