Yeah, people are unfortunately not informed on just how much power border agents wield. Not only in the US, but in many (most I'd believe) other countries, too. I've worked on cases (intel side) where the law-enforcement side would just wait for the surveillance objects to cross the border, as that's where they could do most data collection with the least hassle.
If for whatever reason you think you're being investigated or surveilled (who knows for what these days, could be enough to just associate with the various protest groups / orgs), you can just assume that the border will be where they'll try to clone / download your data (phones, laptops, whatever)
If for whatever reason you think you're being investigated or surveilled (who knows for what these days, could be enough to just associate with the various protest groups / orgs), you can just assume that the border will be where they'll try to clone / download your data (phones, laptops, whatever)