Mexico's card in the Trump v. Mexico debacle

From the Economist:

In 2009, after America blocked Mexican lorries from operating north of the border—to protect the jobs of American drivers—Mexico imposed tariffs on nearly 100 American products, from Christmas trees to felt-tipped pens, choosing industries with clout in congressional districts whose representatives had a say in the dispute. The American block was eventually lifted.

 A good thing to remember here is that Mexico isn't completely hopeless against Trump-style strongman policy. Yes, they are heavily reliant on America - to put it simply, bilateral trade between the Mexico and the U.S is responsible for half of the former's GDP.

But geographical and geopolitical closeness means that the two countries are inevitably tied. It would be impossible to hurt one without hurting the other. According to the Economist, the "design, manufacture, and servicing of everything from appliances to medical equipment is spread across both borders" - approx. 5 million American jobs depend on trade between America and Mexico.

Despite Mr. Trump's proposed policies, it is impossible to erase the fact that the two countries are literally; physically connected. They're literally on the same expanse of land. With this comes  a symbiotic interdependence, spanning over two centuries, and no "impenetrable physical wall" is going to change this.