Interestingly, even US citizens aren't exempted from this. Constitutional rights seemingly don't apply at the border.
https://www.aclu.org/other/constitution-100-mile-border-zone
I knew it was a lot but I didn't guess two thirds. That makes it laughable.
There is a high probability of aggressive mass action within the US under the banner of 'border security' in the not-very distant future which is going to force people to choose sides.