They should lock him in a basement for the rest of his life, and see how he likes it. The only visitors he gets is from someone bringing food and some prisoner serving hard time who wouldn't mind making him his man-bitch.
Back to immigration. The only time I've seen a wall work is in the movie doomsday, and I doubt they would construct that kind of a wall on the entire border.
Maybe they should train prarie dogs to hunt and disable humans for capture before releasing them into the wild.
For a more pratical solution however, either we annex Mexico (and Canada while we are at it), or we send in a military force (on loan, not in invasion) to help restore order, and then flood the country with people to help rebuild it.