There's a very clear connection between the stupidity of the "drug war" and the desire for a wall. Both are delusional and hinge on laws that don't acknowledge reality. The reality is that people, many people, in the US want drugs, and they want Mexican immigrants. That's why both are here, regardless of authoritarian attempts to prevent it. Statists become enamored with the idea that government can solve social problems by passing laws, but usually it doesn't work. For the most part, people are going to do what they want regardless of the law. Laws only work to codify behavior that the overwhelming majority have already adopted. That's why it's so stupid to pass laws that pursue significant social change without a real consensus behind them. 51% just won't cut it.