To be more specific, US corporate media are not covering it honestly.
Much like the U.S., the Mexican government is susceptible to corporate influence. It just so happens that the most influential corporate entities in Mexico are drug cartels — and it’s hard for the government to reign in entities that fund and infiltrate it. Similar to the phenomenon of “regulatory capture,” the Mexican government is at least partially funded and co-opted by drug cartels. This festering problem is an underlying factor in the current civil unrest in Mexico.