Te Wall is metaphor for actually enforcing the border.
Exactly. Trump intentionally speaks on a 7th grade level (have you been to WalMart lately, LOL). The man is no idiot. When he says build a wall, he means he will stop illegal immagration. He is certainly not one to throw money at inneffective solutions. You can bet his solution will come from those in the trenches. Thats his standard OP.
