The Fourth Amendment says that “The right of the people to be secure in their person, houses, papers, and effects, against unreasonable searches, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.” But at the border, warrantless searches are OK, even when it comes to our digital devices. With Trump’s focus on the border, this is becoming a bigger deal.