The whole framing of border security to combat human trafficking, like so much other US policy discourse around Latin American issues, is completely ass-backwards. The human trafficking (in the sense of 'voluntary' people-smuggling, not, like, kidnapping or duping people for de facto slavery) is caused by the militarized/sealed border, period. Just let people cross (both ways) and they won't need coyotes.
The modern "sealed" border is a relatively new thing, which most people don't realize. The border was porous for seasonal migrants for most of its history (including the period when it was moved some thousand miles westward by a criminal war of aggression). It was only in the 20th century that Americans became worried about racial eugenics and decided the border needed to be "secure."
Which is what has not only caused the demand for people-smuggling, but also led to many, many more one-way crossings than previously. It became too risky to cross over and over again; much easier to cross once and then try to make your way in the land of opportunity.
A border security regime focused on actually keeping people safe, rather than keeping racial contagion out of the land of the free and home of the whites, would look very different from what we have now.
