If an app is a national security threat, maybe people shouldn’t be carrying them around military bases :shrug:
https://www.military.com/daily-news/2019/12/30/army-follows-...
Trump's move is pure theatre. He has no clue about real security and he's throwing his weight around like an attention-seeking child, because that's what he does.
This is an entirely orthogonal issue to something that's been missing in the West for decades - a coherent program of IT security and IoT and app standards which define exactly what products and apps can and can't do, and which enforces a testing and certification process to make sure products and services stay within the lines.
And also... mandated protections for user data - something the EU is moving towards, but which the US still seems to be having issues with.
Between IoT, IT infrastructure, poor corporate security, and unregulated data capture, there are much more serious security threats than the TikTok app.