[wool_gather]

There seems to be a certain amount of violence that comes with the territory of illegal drug trafficking; that might not be national security per se, but it's certainly something within the government's purview. It's also not that much of a stretch to say that a public health crisis of drug addiction would be a kind of threat to national security. Of course, if that were the real thing, DHS should be going after the opioid peddlers, so...

[wjn0]

Well of course it's within the government's purview, but we have to draw a line between law enforcement and military-run surveillance somewhere, and it seems to me drug enforcement (violent or not) falls staunchly within the former's purview. The blurring of that line or its movement altogether strikes me as dangerous (cf. the mosaic theory of the 4th amendment [1]).

[1] https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2032821