"The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, 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." -- 4th Amendment to the Constitution of the United States.
USBP checkpoints located anywhere other than an international border are defacto general purpose crime detection checkpoints and unconstitutional.
Americans should be allowed to freely travel the freeways, highways, and roads without becoming subject to the undue scrutiny of Federal Law Enforcement.
This is not Soviet Russia.