The border has been an issue since the mid 1980’s, and certainly a huge issue since 9/11/01.
Obviously what the commoners think matters little to the ‘public servants’ those commoners put in office.
This kind of poll only tells the politicians what to focus on when it comes time to ask for money or campaign.
I watched this Charles Bronson movie a bit ago. It was all about the “wets” that kept coming across the border. It was actually pretty good. From 1980.
http://www.imdb.com/title/tt0080465/?ref_=nm_flmg_act_20