Of course it’s constitutional, or rather the constitution doesn’t matter in this case. It’s well known that the constitution doesn’t fully apply within 100 miles of the border: the border search exception means that citizens living “near” the border have no need for probable cause to be searched, where near a border covers two-thirds of Americans. Like the entire state of New Jersey, for instance
Sic transit gloria mundi
Sic transit gloria mundi
"Kitto daijoubu da yo." - Sakura Kinomoto