ok, but before you build a wall, why not first legalize drugs, and then they will be hauling on the interstate where they belong and not wasting time and energy walking across your land.
Even if they were to legalize drugs, their will always be a black market, you think gov't not put huge tax like in Colorado? The street vendors who sell illegally up there is making a killing on selling grass cause they don't charge taxes. And it is not much Mary Jane Mexs hauling over, heroin and cocaine mainly what they bringing over, and again it could be pure or ajax poison. Never going to legalize the hard stuff, and reason why is Feds want to be able to get tax money to spend in other ways.
And are you going to legalize slave labor as well? Do you have kids? how you feel if they died from poison coke going up their nose? Until people have pain in their lives, they think all should be legal.