Posting as someone who lives just north of said border...
There is NO possible way to actually close the border shy of a 10+ year effort to create the famous "Kuwait tank ditch" type barrier. And then watch them dig underneath it, like their doing to the wall the Marine Reservists have been building the past several years.
It would take a concerted effort by the Mexican government to even begin to stem the flow of drugs and humans that pour north every day. Will Vincente do it? No. So all the efforts that are going on now to stop it will eventually come to naught.
Just my thougts on the matter.
dear God, FNC is off to yap about lori hacking all ready