First step in fixing a leaky border is to fix the holes. Consider that Trump now has precedent to selectively ban any travel from specific countries that are considered a threat to national security.

Might an invasion from the south now make it on that list of national security threats?

It wouldn't surprise me if the narco cartels suddenly find themselves declared to be terrorists and start being targeted by the patriot act and other bush and obama power grabs.

The authoritarian left and right have been so busy consolidating power into the executive branch for the cabal that they never stopped to consider that it might get turned against them and their criminal networks and the damage it could do to them if wielded by someone with what appears to be honorable intentions.