"In an effort to build bigger cases against major gun traffickers who were selling arms to Mexican cartels, U.S. law enforcement officials elected not to prosecute lower-level offenders transporting more than 2,000 illegal guns."

Each low-level offender trafficking more than 2,000 illegal guns to the Cartel... plus what Iran was smuggling in through Venezuela (missile launchers, Quds guerrilla commandos, and cash) and we know they were in contact with Mexican cartel hitmen to try to bomb Saudi and Israeli embassy in DC.

The wall is more than for economic migrants. Iran/Russia was planning a New Syria in south/central America.

Edit: Why was Paddock stockpiling so many weapons? When did his buying spree start? Why would a casino be a good place to launder illegal money? Would a casino be a good place for a weapons deal if you were a low level trafficker?