There are border checkpoints between San Diego and Los Angeles. I am at a loss on how they can tell who or who isn’t legal as you drive by the check point but evidently they have a system.
In the 1970s (if I remember correctly) these type of checkpoints were challenged in court and the Supreme Court ruled they were okay.
There is a technicality about being so many miles from a border turning the whole zone into a “checkpoint” that libertarians of WND for one were constantly bristling over as this was a belt densely populated by Americans.
Can even Donald Trump talk his way past the culture shock? The next big thing that Democrats may try is to reach libertarian instead of pure liberal, and that could get some of the GOP traditional support.