Sigh. No, he's wrong, and you are too. If you come up to a Border Patrol checkpoint at the border or within 100 miles of the border, the Border Patrol can sea

Sigh. No, he's wrong, and you are too. If you come up to a Border Patrol checkpoint at the border or within 100 miles of the border, the Border Patrol can search your car and all your personal belongings. They can seize anything that appears to be contraband or evidence of a crime. Full stop, end of sentence, no probable cause required. Completely legal for the border guards to tear down EVERY SINGLE CAR that crosses the border (or a checkpoint within 100 miles of the border). If you don't like it blame the Supreme Court: United States v. Martinez-Fuerte. Border searches in the US have never required probable cause.