Whether you have "constitutional protections" isn't a boolean state. The second paragraph of the intro covers this: https://en.wikipedia.org/wiki/Border_search_

Whether you have "constitutional protections" isn't a boolean state. The second paragraph of the intro covers this: https://en.wikipedia.org/wiki/Border_search_exception https://en.wikipedia.org/wiki/Border_search_exception As noted there routine stops within such areas have been upheld, but not searches without a warrant. Presumably the ACLU is looking to broaden those protection to include electronic devices.