Shootouts with police by heavily armed gangs. High level governmental and police involvement with criminal gangs. Police shot dead. Corpses booby trapped with IEDs. Mexico is getting wobbly.
What happens when the violence spills over across the US border? And it will.
Why is the US such a huge consumer of drugs? Without a US market for cocaine, heroin, meth, and weed, such drug cartels would not exist. All that money has to be going into banks and investments somewhere. What do they own?