Why doesn't the USA invade the territory 50 miles south from the border to set up a permanent buffer zone and use your question as justification when the mexicans start bitching about it?
>then we'd have to deal with securing 50 miles of mexico
It seems you do not understand what a buffer zone is.
>we don't want a buffer zone, we want a wall
I don't think you understand the concept. A wall is more effective with a buffer zone and easier to build once we have both the mexican government and USA civil jurisdiction out of the away..