https://www.techdirt.com/articles/20191018/18413243219/cbp-local-law-enforcement-are-mixing-matching-surveillance-gear-to-skirt-already-minimal-constitutional-protections.shtml

The border is expanding. What normal people would consider a border -- the physical and political barriers between countries, sometimes protected by walls and checkpoints -- isn't what the US government considers a "border." In this country, the "border" covers 100 miles inland from any border crossing. And that's not just border border crossings. That's any international airport as well.

Consequently, the "border" encompasses a large percentage of the US population. This isn't just a weird fact. It's actually means there's a whole lot less "America" than people think. The rights enshrined in the Constitution just don't mean as much at the border, where courts and Congress have given the federal government permission to engage in suspicionless searches and warrantless detentions.