This is settled law. 8 U.S.C. § 1357(a)(3) allows immigration officers to conduct warrantless searches and interrogations “within a reasonable distance” of the border. The term “reasonable distance” has been defined by regulation (8 C.F.R. § 287.1) as within 100 miles of any U.S. international boundary or coastline.
There is one exception in case law: they cannot stop vehicles at random without “reasonable suspicion” outside of fixed checkpoints (based on United States v. Brignoni-Ponce, 422 U.S. 873 (1975)).
The judge has not decided the case yet, but she likely understands the above well, and any judgement will be narrow and specifically within the confines of existing statute and precedent. U.S. border security laws have always been incredibly broad and arguably draconian. Successive administrations on the left and the right have kept it that way.
Don’t forget that international airports count as an international boundary, so that basically covers the whole country.
