I think the bulk of voting Americans have moved on from Afghanistan and that will remain so as long as Trump doesn't call attention to it because he is provably responsible for the mess that it became. His anti-interventionist allies hardly mention it at all.

The only people who care at this point are the people who thought that a 20 year occupation was a good thing and thought saving a fairly corrupt and ineffective regime was in anyone's best interest. Policy wonks, the punditocracy, political elites and think tank intelligentsia. Most others feel no moral stain from abandoning Afghanistan.

The calling attention to the wider threat of terrorism within the country is a good idea. It justifies the surveillance powers of the government which has, as of late, suffered much criticism. It isn't a matter of IF terrorists will strike only WHEN and how they will strike. Psychologically preparing the people for this will help to minimize the inevitable blame the administration will be given for not being able to stop the inevitable.

Most of us think 9/11 when we contemplate terrorist attacks but perhaps smaller sabotage on the ground aided by cyber-attacks from unknown sources which could paralyze whole sectors of our infrastructure is also just as possible.