The border wall isn't much in the discussion these days, and for good reason. It's not high on our list of priorities, particularly given how we've suddenly discovered the benefits of strong borders.
However, once life resumes its familiar patterns, as it inevitably will, illegal immigration will ramp up. That's when we'll be reminded of an important fact: Walls work. And only one party, when it controls the White House, is willing to build them.
If you needed any reinforcement on whether they work, evidence came in San Diego last week.