I think this is what he was getting at
LINK:
Misconception 2: “Building a wall would greatly reduce heroin, methamphetamine, cocaine, and fentanyl trafficking.”
Proponents of a border wall often claim that it would help the United States solve its opioid addiction problem by blocking heroin smugglers from Mexico. This reveals a misunderstanding of how cross-border smuggling works.
The vast majority of the drug that enters from Mexico does so through “ports of entry”—the 48 official land crossings through which millions of people, vehicles, and cargo pass every day. “Heroin seizures almost predominantly are through the port of entry and either carried in a concealed part of a vehicle or carried by an individual,” then-U.S. Customs and Border Protection Commissioner Gil Kerlikowske told a congressional committee last year. “We don’t get much heroin seized by Border Patrol coming through, I think just because there are a lot of risks to the smugglers and the difficulty of trying to smuggle it through,” he said.
“The most common method employed by Mexican TCOs [Transnational Criminal Organizations] involves transporting drugs in vehicles through U.S. ports of entry (POEs),” the U.S. Drug Enforcement Agency (DEA) reported in its 2016 National Drug Threat Assessment. “Illicit drugs are smuggled into the United States in concealed compartments within passenger vehicles or commingled with legitimate goods on tractor trailers,” according to the document.
Heroin is small in volume. “It’s a relatively small amount—40-50 tons, we think—of heroin that feeds the heroin epidemic in the United States,” Gen. John Kelly, then the commander of U.S. Southern Command, told a Senate committee in 2015. The amount has probably increased somewhat today, but still takes up little space: all the heroin consumed in the United States in an entire year could probably fit into two 40-foot shipping containers.
Now, imagine the contents of those containers broken up into tiny amounts and scattered across vehicles, luggage, and cargo shipments and sent through 48 land crossings, plus airports, over the course of 365 days. The difficulty explains why in 2015, the DEA reported that U.S. authorities managed to seize 6.8 tons of heroin, an amount equal to perhaps one-seventh of Gen. Kelly’s demand estimate.
The dynamic is similar for other compact-volume drugs like cocaine, methamphetamine, and fentanyl, which are overwhelmingly seized at ports of entry. Cannabis, which is larger and bulkier, appears to be trafficked more frequently in the areas between the ports.
With a small, compact, and expensive product, and a six-sevenths chance of avoiding detection and seizure, it’s unsurprising that most heroin smugglers don’t bother to transport it between the ports of entry, in the sparsely populated or wilderness zones where proposed border fencing might be built.
Obama's policies were real policies that worked better than trump and Obama deported more illegal immigrants. And trump just left Joe one more his failures to clean up. The guy promised Mexico would pay. They didn't and laughed at us. He stole that money from the US military to fund a wall that nobody wanted, didn't work and will never work. It really is time to stop believing the lies of a failed steak-salesman who destroys everything he touches.
I shouldn't be surprised to see you doubling down on this stuff. 
