"[...] Since 1953, the US Department of Justice has defined the border to be anywhere within 100 miles of the actual national limits.[...] According to the American Civil Liberties Union, about two-thirds of the people in the US live within 100 miles of a border. So in theory these 200 million border zone dwellers could have their phones seized and searched at any time by CBP agents without a warrant.[...]"

From the register (2023)

https://www.theregister.com/security/2023/06/01/us-court-fin...