The next step is mandatory facial recognition of everyone in the U.S. What better way to track all of those visitors who come into the country and where they go

The next step is mandatory facial recognition of everyone in the U.S. What better way to track all of those visitors who come into the country and where they go than to track everyone everywhere all the time. License plates are already recorded almost everywhere. The location of your cell phone clearly has to be known by the carrier, it's a simple database dump to track your phone. Track everything you do online by tapping databases from Facebook and Google (as best you can since they probably don't want you to). Track all of your credit card, stock and other purchases. Correlate all of these data points together, and imagine the possibilities. Of course it's not 100% accurate, but for nearly 400 Million people (citizens, illegals and visitors) what's a few tens of millions of inaccurate data points.