Chaos in Mexico Expands Rapidly as Two-Thirds of the Country Experience Cartel Violence

The most wanted drug lord in Mexico is dead, American tourists are sheltering in place across five states, and the cartel that pumped fentanyl into the United States for a decade responded to losing its leader by lighting the country on fire. The killing of Nemesio Rubén Oseguera Cervantes — known to the world as “El Mencho” — was supposed to be a victory. What followed made the meaning of that word very complicated.

Violence has spread to 20 of the 31 Mexican states, nearly two thirds of the entire country. And as the Mexican government tries to send in military support for law enforcement that is clearly outgunned and outmanned, logistic issues pose challenges. The cartels do not operate from large bases away from the population. They are spread out and embedded in cities and towns that offer cover from direct military actions.

Mexican law enforcement tracked down and attempted to capture El Mencho on Sunday in the town of Tapalpa in the western state of Jalisco, roughly two hours southwest of Guadalajara. According to Mexico’s Defense Ministry, troops came under fire at the location and killed four people during the operation. El Mencho was wounded in the confrontation and died while being airlifted to Mexico City. Two others were arrested, and soldiers seized armored vehicles, rocket launchers, and other weapons at the site. By any measurement, the operation itself was a success. What came after was not.

Within hours, the Jalisco New Generation Cartel — known by its Spanish initials, CJNG — unleashed coordinated chaos across Mexico. Cars burned out by cartel members blocked roads in 20 Mexican states. Guadalajara, Mexico’s second-largest city, became a ghost town. Stores shuttered. Public transportation was suspended. Civilians hunkered down as Telemundo reported the city was paralyzed.

One American tourist in Puerto Vallarta, a Minnesotan named Jim Beck who has visited the resort city for over two decades, described what he witnessed: “Today, everybody was running down the streets in panic and terror as cars were blowing up all over the place.”

The U.S. State Department moved quickly. American citizens in the Mexican states of Jalisco, Tamaulipas, Michoacán, Guerrero, and Nuevo Leon were urged to shelter in place due to “ongoing security operations and related road blockages and criminal activity.”

Canada issued a similar warning to its nationals, and more than 26,000 Canadians were registered in Mexico as the violence spread. Airlines scrambled. United, Southwest, Delta, Alaska, and Air Canada all canceled flights to Puerto Vallarta. At least one American Airlines flight turned around mid-air as the situation deteriorated on the ground.

El Mencho’s biography reads like a case study in how broken institutions produce monsters. A former police officer, he founded the Jalisco New Generation Cartel around 2009, and over the following decade and a half built it into Mexico’s fastest-growing criminal organization, moving cocaine, methamphetamines, fentanyl, and migrants to the United States, and using violence with drones and improvised explosive devices.

The CJNG earned a reputation for spectacular aggression: downing a military helicopter in Jalisco in 2015 and attempting to assassinate Mexico City Police Chief Omar García Harfuch — the same man who now serves as Mexico’s federal security secretary. The U.S. Drug Enforcement Administration had classified it as one of the most powerful and ruthless criminal organizations in Mexico, and the State Department had placed a $15 million reward on El Mencho’s head.

That reward will go uncollected, but the problem the CJNG represents is far from solved. The cartel’s reaction to its leader’s death was not the reaction of a broken organization. It was the reaction of one that had contingency plans, loyal regional commanders, and enough muscle to shut down a significant portion of a nation within hours.

Security experts warned of the greatest fear: that the cartel could turn to indiscriminate violence and “launch narcoterrorism attacks,” generating a scenario resembling what Colombia experienced in the 1990s — car bombs, assassinations, attacks on aircraft. Whether CJNG has the organizational coherence and the ambition to go that route remains to be seen, but the opening hours after El Mencho’s death offered few reasons for optimism.

The geopolitical dimension of this moment is impossible to ignore. President Trump has spent months pressuring Mexican President Claudia Sheinbaum to deliver concrete results against the cartels, threatening military intervention and higher tariffs if she failed. Shortly after the U.S. capture of ousted Venezuelan leader Nicolás Maduro, Trump suggested he could expand his military campaign to Mexican drug trafficking groups.

The killing of El Mencho appears, at least in part, to be Mexico’s attempt to demonstrate progress and ease that pressure. His death was described as the biggest prize yet for the Mexican government in its efforts to satisfy the Trump administration. Whether Washington accepts it as sufficient — and whether the CJNG’s immediate revenge campaign undermines that argument — will shape the next phase of U.S.-Mexico relations.

Sheinbaum had previously cast doubt on the “kingpin” strategy of targeting cartel leaders, warning that decapitating criminal organizations can fracture them into rival factions and ignite new cycles of violence. There is dark irony in the fact that her government executed precisely that strategy under pressure, only to immediately validate her own warning. The question now is whether the violence that erupted on Sunday represents a temporary convulsion — a death rattle from loyal soldiers acting on instinct — or the opening move in a more sustained and dangerous period of cartel warfare.

History offers little comfort. When El Chapo was recaptured in 2016, the Sinaloa Cartel fractured, and the resulting power vacuum was filled in part by the very organization that just lost its own leader. Cartel structures are more resilient than their figureheads. Lieutenants who spent years building regional fiefdoms do not simply hand over their territories because the boss is gone. They fight over them — and in Mexico, that fight has a tendency to spill over roads, borders, tourist resorts, and the daily lives of millions of ordinary people who never asked to live inside a cartel’s operating territory.

The immediate concern for American tourists and expatriates in Mexico is practical and urgent. Five states under shelter-in-place advisories cover a vast portion of the country, including some of its most visited destinations. Anyone currently in those regions should stay current with State Department guidance, avoid road travel until conditions stabilize, and take seriously the consular messaging that has been issued. The situation remains fluid. Jalisco is scheduled to host four matches of the 2026 FIFA World Cup in June. Whether that timeline holds — and what it says about the state of security in western Mexico if it does — is a question the Mexican government will need to answer in the months ahead.

What Sunday made clear is that the cartels are not a peripheral law enforcement problem. They are a parallel power structure, capable of mobilizing violence across an entire nation within hours of losing their most prominent leader. That is not the profile of a criminal enterprise. That is the profile of an insurgency. And how the United States, Mexico, and the rest of the region choose to respond to that reality — not just to the death of one man, but to the system that produced him and survived him — will determine whether El Mencho’s killing is remembered as a turning point or just another data point in an unending crisis.