The problem is that the Trump administration interprets those laws as granting them the power to do warrantless vehicle stops and searches, as well as expedited

The problem is that the Trump administration interprets those laws as granting them the power to do warrantless vehicle stops and searches, as well as expedited removal, anywhere in that 100-mile zone. The ACLU has a page about it: https://www.aclu.org/know-your-rights/border-zone https://www.aclu.org/know-your-rights/border-zone