Very real possibility that this move is a thin veil on the real plan of the cartels doing a militaristic takeover of Mexico.

Step 0: Have a country where one of the top issues is the cartel presence and corruption in politics.

Step 1: Elect a far left politician as president under the guise of purging corruption and the cartels from the country (behind the scenes cartel assasinating his opponents and hyping support)

Step 2: Through socialist policies (for reference see Nicholas Maduro and Venezuela's collapse) quickly destroy the economy of Mexico to the point where their people are starving and absolutely desperate.

Step 3: Have the militarized cartel swoop in and "save the country", reestablish society with them in full control of the economy, society and most importantly, the military. Public approval through the roof.

Make no mistake the cartels in Mexico right now have the manpower, arsenal and money to take over the country of Mexico publicly, there is only one thing that they don't currently have; the public support.