I hate the Democrats but this surprised me. They might be right Trump is making this all up.
https://hubpages.com/politics/Illega...-Historic-Lows
If you had 20 women a year getting raped in your town, took some measures to stop rape, and it went down to 10 women a year, is that not still a crisis?
Illegal immigration is usually proportional with our economy. The more jobs we have available, the more people want to share in that fortune.
Looking at your chart, apprehensions went down in our recession and poor economy that followed. It started to go up again as the economy picked up. This is normal. However under Trump, the economy got a super boost, and yet apprehensions went down.
What does this tell us? A strong enough deterrent works. With the economy we have had the last year or so, our apprehensions should be at ten year highs if not more. But they're not. They are actually going in the other direction.
And this is what the left fears the most about a wall. If you think our apprehensions are down now, wait until after the wall is built.