There is a shortage of 20,000 truck drivers in the US (probably as a result of the importation of cheap Chinese goods into the US, China has a 200 Billion Dollar a year trade surplus with the US but this is another story). This free border is a method of circumventing the laws of the US to allow inferior substandard Mexican trucks and drivers access into the US.
More evidence of the attempt to transform the US into a 3rd World country.
I'm not following you . . . there is a shortage of drivers in the U.S. because more imported goods are being shipped there?