Mexico shares a nearly 2,000-mile border with the United States, and the two countries have historically close trade, cultural, and demographic ties. Mexico's stability is of critical importance to the United States, and the nature and intensity of violence in Mexico has been of particular concern to the U.S. Congress. Rising murders, intimidation of Mexican politicians in advance of the 2018 elections, and increasing assassinations of journalists and media personnel have continued to raise alarm. In 2017, 12 journalists were murdered and that number may increase in 2018, as 7 journalists were killed in the first 6 months of the year. Mexico's brutal drug trafficking-related violence has been dramatically punctuated by beheadings, public hanging of corpses, car bombs, and murders of dozens of journalists and government officials. Beyond these brazen crimes, violence has spread from the border with the United States to Mexico's interior, flaring in the Pacific states of Michoacán and Guerrero in recent years, in the border state of Tamaulipas, and in Chihuahua and Baja California, where Mexico's largest border-region cities of Juárez and Tijuana are located. Organized crime groups have splintered and diversified their crime activities, turning to extortion, kidnapping, auto theft, oil smuggling, human smuggling, retail drug sales, and other illicit enterprises. These crimes often are described as more "parasitic" for local populations inside Mexico. Addressing the question of whether violence (as measured by the number of intentional homicides) has reached new heights, the Justice in Mexico project at the University of San Diego reports that total homicides in Mexico increased by 7% between 2014 and 2015. Drug traffickers continue to exercise significant territorial influence in parts of the country, particularly near drug production hubs and along drug-trafficking routes during the Peña Nieto administration as they had under the previous president. Although homicide rates declined during the first two years of Peña Nieto's six-year term, total homicides rose 7% in 2015, 22% in 2016, and 23% in 2017, reaching a record level. In 2017, government statistics from the National Public Security System indicate there were more than 29,000 intentional homicides—a new record that exceeded the previous high in 2011. In addition, several analysts have raised concerns about severe human rights violations involving Mexican military an d police forces, which, at times, have reportedly colluded with Mexico's criminal groups. Notably, the Mexican armed forces injured or killed some 3,900 individuals in their domestic operations, between 2007 and 2014, with the victims labeled as "civilian aggressors." However, the high death rate (about 500 were injuries and the rest killings) indicates the lethality of the encounters with Mexican military and official reports did not sort out in published statistics how many of the military's victims were armed or were mere bystanders. (Significantly, these statistics did not continue to be made public after 2014). Due to casualty estimates being reported differently by the Mexican government than by the media outlets that track the violence, some debate exists on exactly how many have perished. This report conveys government data, but the data have not consistently been reported promptly or completely. For example, the government of President Felipe Calderón released tallies of "organized-crime related" homicides through September 2011. For a time, the Peña Nieto administration also issued such estimates, but it stopped in mid-2013. Although precise tallies diverged, the trend during President Calderón's tenure was a sharp increase in the number of homicides related to organized crime through 2011, when the number started a slight decline before Calderón left office in late 2012. Of total intentional homicides since 2006, many sources indicate that roughly 150,000 of total homicides were organized crime-related killings. Violence is an intrinsic feature of the trade in illicit drugs. Violence is used by traffickers to settle disputes, and a credible threat of violence maintains employee discipline and a semblance of order with suppliers, creditors, and buyers. This type of drug trafficking-related violence has occurred routinely and intermittently in U.S. cities since the early 1980s. The violence now associated with drug trafficking organizations in Mexico is of an entirely different scale. In Mexico, the violence is not only associated with resolving disputes or maintaining discipline but also has been directed toward the government, political candidates, and the news media. Some observers note that the excesses of some of Mexico's violence might even be considered exceptional by the typical standards of organized crime. Yet, Mexico's homicide rate is not exceptional in the region, where many countries are plagued by high rates of violent crime, such as in the northern triangle countries of Central America—El Salvador, Guatemala, and Honduras. Overall, the region of Latin America has a relatively high homicide level; with 8% of the world's population, Latin America has 33% of the world's intentional homicides. Mexico's quick rise in killings associated with the drug war along with the violence in six other countries in the region—Brazil, Colombia, El Salvador, Guatemala, Honduras, and Venezuela—is also concerning to many observers. University of San Diego researchers observe that although Mexico's homicide rates compared to homicide rates in other Western Hemisphere countries fall somewhere in the middle of the regional grouping, the rapid rise in both Mexico's rate of homicides and its absolute number of homicides is unmatched. Estimates of Mexico's disappeared or missing—numbering more than 34,000 as recently reported by the Mexican government—has created both domestic and international concern. Former President Calderón made an aggressive campaign against criminal groups, especially the large drug trafficking organizations (DTOs), the central focus of his administration's policy. He sent several thousand Mexican military troops and federal police to combat the organizations in drug trafficking "hot spots" around the country. His government made some dramatic and well-publicized arrests, but few of those captured kingpins were either prosecuted or convicted. Between 2007 and 2012, as part of much closer U.S.-Mexican security cooperation, the Mexican government significantly increased extraditions to the United States, with a majority of the suspects wanted by the U.S. government on drug trafficking and related charges. The number of extraditions peaked in 2012, but declined somewhat in the first two full years after President Peña Nieto took office. Another result of this "militarized" strategy was an increase in accusations of human rights violations against the Mexican military, which was largely untrained in domestic policing. When President Peña Nieto took office in late 2012, he indicated he would take a new direction in his security policy: more focused on reducing criminal violence that affects civilians and businesses and less oriented toward removing the leadership of the large DTOs. His then-attorney general, Jesus Murillo Karam, said in 2012 that Mexico faced challenges from some 60 to 80 crime groups operating in the country whose proliferation he attributed to the Calderón government's kingpin strategy. However, despite Peña Nieto's stated commitment to shift the focus of the government's strategy, analysts have noted considerable continuity between Peña Nieto and Calderón's security approaches. The Peña Nieto government continued the military and federal police deployments used by the Calderón government to combat the DTOs, but it recentralized control over security to Mexico's interior ministry. Moreover, the use of a strategy of taking down through arrest or killing the top drug kingpins has continued. President Peña Nieto streamlined cooperation with the United States under the Mérida Initiative, which began during President Calderón's term. The Mérida Initiative, a bilateral anticrime assistance package launched in 2008, initially focused on providing Mexico with hardware, such as planes, scanners, and other equipment, to combat the DTOs. The $2.9 billion effort (through 2017) shifted in recent years to focus on training and technical assistance for the police and enactment of judicial reform, including training at the local and state level, southern border enhancements and crime prevention. After some reorganization of bilateral cooperation efforts, the Peña Nieto government continued the Mérida programs. In 2014, the Peña Nieto administration implemented another security strategy element promised during his presidential campaign: standing up a national militarized police force, or gendarmarie . The scope of the force implemented in August 2014 was significantly scaled back from its original proposed size of 40,000 to 5,000 officers who were added to the federal police force. The new force had the mission of protecting citizens from crime and shielding their economic and industrial activities from harm, such as defending vital petroleum infrastructure, although many observers maintain that the gendarmerie's distinct purpose was never followed. President Peña Nieto's focus on crime prevention, which also received significant attention early in his term, eventually declined as well, in part due to slow growth. As world oil prices dropped dramatically in 2014 causing reduced economic expansion, the Peña Nieto administration imposed significant budget austerity measures, including on some aspects of security. For more than a decade, Members of Congress convened numerous hearings dealing with the violence in Mexico, U.S. foreign assistance, and border security issues. Congressional concern heightened after U.S. consulate staff and security personnel working in Mexico came under attack, with some killed or wounded, allegedly with corrupt police support. Occasional use of car bombs, grenades, and rocket-propelled grenade launchers—such as the one used to bring down a Mexican army helicopter in May 2015—continue to raise concerns that some Mexican drug traffickers may be adopting insurgent or terrorist techniques. Potential harm from Mexico's criminal groups—or transnational criminal organizations (TCOs), as the U.S. Department of Justice now identifies them—is due in large part to their control of and efforts to move illicit drugs and to expand aggressively into the heroin (or plant-based) and synthetic opioids market. Mexico experienced a sharp increase in opium poppy cultivation between 2014 and 2017; increasingly Mexico has become a transit country for powerful synthetic opioids, such as fentanyl. A large increase in political candidates slain during the 2018 electoral season in Mexico caused some candidates to withdraw from their races in order to avoid violence to themselves or their staffs and families. This poses another concerning threat to democracy in Mexico of overt political intimidation. Crime linked to violence, such as extortion, forced disappearances, and violent robbery, has also risen as the crime groups have diversified their activities. The U.S. Congress has expressed concern over the violence and has sought to provide oversight on U.S.-Mexican security cooperation. The 115 th Congress may continue to evaluate how the Mexican government is combating the illicit drug trade, working to reduce related violence, and monitor the effects of drug trafficking and violence challenges on the security of both the United States and Mexico. In March 2017, the U.S. Senate passed S.Res. 83 in support of both Mexico and China and their efforts to achieve reductions in fentanyl production and trafficking. Going forward, some uncertainty has arisen due to tensions between the Trump Administration and the Mexican government regarding several other areas of the U.S.-Mexican relationship. The Morena party candidate, President-elect Andrés Manuel López Obrador (known by his initials AMLO), won with 53% of the vote on July 1, 2018. A leftist populist, AMLO may fall back on skepticism toward the U.S. government that he advocated during his campaign, with the potential result of lowering cooperation on security matters. The splintering of the large DTOs into competing factions and gangs of different sizes took place over several years beginning in 2007 and reaching the present. The development of these different crime groups, ranging from transnational criminal organizations (known as TCOs) to small local mafias with certain trafficking or other crime specialties, has made the crime situation even more diffuse and the groups' criminal behavior harder to eradicate. The large DTOs, which tended to be hierarchical, often bound by familial ties, and led by hard-to-capture cartel kingpins, have been replaced by flatter, more nimble organizations that tend to be loosely networked. Far more common in the present crime group formation is the outsourcing of certain aspects of trafficking. The various smaller organizations resist the imposition of norms to limit violence. The growth of rivalries among a greater number of organized crime "players" has produced continued violence, albeit in some cases these players are "less able to threaten the state and less endowed with impunity." On the other hand, the larger organizations (Sinaloa, for example) that have adopted a cellular structure still have attempted to protect their leadership, as in the 2015 escape orchestrated for the world's most-wanted drug kingpin, "El Chapo" Guzmán, through a mile-long tunnel from a maximum-security prison. The scope of the violence generated by Mexican crime groups has been difficult to measure due to restricted reporting by the government and attempts by crime groups to mislead the public. The criminal actors sometimes publicize their crimes in garish displays intended to intimidate their rivals, the public, or security forces, or they publicize the criminal acts of violence on the internet. Conversely, the DTOs may seek to mask their crimes by indicating that other actors or cartels, such as a competitor, are responsible. Furthermore, some shoot-outs simply are not reported as a result of media self-censorship or because the bodies disappear. One example is the reported death of a leader of the Knights Templar, Nazario Moreno Gonzalez, who was reported dead in 2010, but no body was recovered. Rumors of his survival persisted and were confirmed in 2014, when he was killed in a gun battle with Mexican security forces. (For more on the Knights Templar, see " Knights Templar " section, below.) Forced disappearances in Mexico have also become a growing concern, and efforts to tabulate an accurate count of the missing or forcibly disappeared have been limited, a problem that is exacerbated by underreporting. Government estimates of the number of disappeared people in Mexico have varied over time, especially of those who are missing due to force and possible homicide. In addition, bodies turn up in mass graves, as in the well-known case of the 43 disappeared students in Iguala, Guerrero, where the Mexican police, the victims' families, and international investigators searching for the students' remains found scores of unmarked mass graves containing bodies that previously had not been counted. In the Gulf Coast state of Veracruz, in mid-March 2017, a vast mass grave was unearthed containing some 250 skulls and other remains, some of which were found to be years old. Estimates of the number of disappeared in Veracruz during the term of former Governor Javier Duarte, who was in office from 2010 to 2016, exceed 5,000. Journalist watchdog group Animal Politico, which focuses on combating corruption with transparency, concludes in a 2018 investigative article that combating impunity and tracking missing persons cannot be handled in several states because 20 of Mexico's 31 states lack the biological databases needed to identify unclaimed bodies. Additionally, 21 states lack access to the national munitions database used to trace bullets and weapons. Drug trafficking organizations have operated in Mexico for more than a century. The DTOs can be described as global businesses with forward and backward linkages for managing supply and distribution in many countries. As businesses, they are concerned with bringing their product to market in the most efficient way to maximize their profits. The Mexican DTOs are the major wholesalers of illegal drugs in the United States and are increasingly gaining control of U.S. retail-level distribution through alliances with U.S. gangs. Their operations, however, are markedly less violent in the United States than in Mexico, despite their reported presence in multiple U.S. jurisdictions. The DTOs use the tools of bribery and violence, which are complementary. Violence is used to discipline employees, enforce transactions, limit the entry of competitors, and coerce. Bribery and corruption help to neutralize government action against the DTOs, ensure impunity, and facilitate smooth operations. The proceeds of drug sales (either laundered or as cash smuggled back to Mexico) are used in part to corrupt U.S. and Mexican border officials, Mexican law enforcement, security forces, and public officials either to ignore DTO activities or to actively support and protect DTOs. Mexican DTOs advance their operations through widespread corruption; when corruption fails to achieve cooperation and acquiescence, violence is the ready alternative. Police corruption has been so extensive that law enforcement officials corrupted or infiltrated by the DTOs and other criminal groups sometimes carry out their violent assignments. Purges of Mexico's municipal, state, and federal police have not contained the problem. The relationship of Mexico's drug traffickers to the government and to one another is a rapidly evolving picture, and any current snapshot (such as the one provided in this report) must be continually adjusted. In the early 20 th century, Mexico was a source of marijuana and heroin trafficked to the United States, and by the 1940s, Mexican drug smugglers were notorious in the United States. The growth and entrenchment of Mexico's drug trafficking networks occurred during a period of one-party rule in Mexico by the Institutional Revolutionary Party (PRI), which governed for 71 years. During that period, the government was centralized and hierarchical, and, to a large degree, it tolerated and protected some drug production and trafficking in certain regions of the country, even though the PRI government did not generally tolerate crime. According to numerous accounts, for many years the Mexican government pursued an overall policy of accommodation. Under this system, arrests and eradication of drug crops took place, but due to the effects of widespread corruption the system was "characterized by a working relationship between Mexican authorities and drug lords" through the 1990s. The system's stability began to fray in the 1990s as Mexican political power decentralized and the push toward democratic pluralism began, first at the local level and then nationally with the election of the National Action Party (PAN) candidate, Vicente Fox, as president in 2000. The process of democratization upended the equilibrium that had developed between state actors (such as the Federal Security Directorate, which oversaw domestic security from 1947 to 1985) and organized crime. No longer were certain officials able to ensure the impunity of drug traffickers to the same degree and to regulate competition among Mexican DTOs for drug trafficking routes, or plazas . To a large extent, DTO violence directed at the government appears to be an attempt to reestablish impunity, while the inter-cartel violence seems to be an attempt to reestablish dominance over specific drug trafficking plazas. The intra-DTO violence (or violence inside the organizations) reflects a reaction to suspected betrayals and the competition to succeed killed or arrested leaders. Before this political development, an important transition of Mexico's role in the international drug trade took place during the 1980s and early 1990s. As Colombian DTOs were forcibly broken up, Mexican traffickers gradually took over the highly profitable traffic in cocaine to the United States. Intense enforcement efforts of the U.S. government led to the shutdown of the traditional trafficking route used by the Colombians through the Caribbean. As Colombian DTOs lost this route, they increasingly subcontracted the trafficking of cocaine produced in the Andean region to the Mexican DTOs, which they paid in cocaine rather than cash. These already-strong Mexican organizations gradually took over the cocaine trafficking business, evolving from being mere couriers for the Colombians to being the wholesalers they are today. As Mexico's DTOs rose to dominate the U.S. drug markets in the 1990s, the business became even more lucrative. This shift raised the stakes, which encouraged the use of violence in Mexico to protect and promote market share. The violent struggle between DTOs over strategic routes and warehouses where drugs are consolidated before entering the United States reflects these higher stakes. Today, the major Mexican DTOs are polydrug, handling more than one type of drug, although they may specialize in the production or trafficking of specific products. According to the U.S. State Department's International Narcotics Control Strategy Report (INCSR ) , Mexico is a major producer of heroin, marijuana, and methamphetamine destined for the United States. It is also the main trafficking route for U.S.-bound cocaine from the major supply countries of Colombia, Peru, and Bolivia. The west coast state of Sinaloa, with its long coastline and difficult-to-access areas, remains favorable for drug cultivation and forms the heartland of Mexico's drug trade. Marijuana and poppy cultivation has flourished in the state for decades. It has been the source of Mexico's most notorious and successful drug traffickers. In the U.S. State Department INCSR covering 2017, published in March 2018, coca bush cultivation and cocaine production in Colombia rose sharply, with the U.S. government estimating for 2016 that Colombia produced 710 metric tons of pure cocaine (and this estimate was subsequently adjusted higher by the Office of National Drug Control Policy (ONDCP) to 772 metric tons for 2016). Cocaine of Colombian origin supplies most of the U.S. market, and most of that supply is trafficked through Mexico. DEA warns that Mexican TCOs present an acute threat to U.S. communities given their dominance in heroin and fentanyl exports in its 2017 National Drug Threat Assessment (NDTA). Mexico's heroin traffickers, who traditionally provided black or brown heroin to U.S. cities west of the Mississippi, began to innovate and changed their opium processing methods to produce white heroin, a purer and more deadly product. The 2017 NDTA maintains that Mexico produced about 93% of the heroin seized in the United States in 2015, and Mexico may be a producer country and is a trafficker of the potent synthetic opioid, fentanyl, which is 30 to 50 times more potent than heroin. The Mexican government eradicates both opium poppy (from which heroin is derived) and cannabis, and it increased its eradication efforts of both plant-based drugs in 2016. According to the State Department's INCSR , Mexico expanded its poppy cultivation to 32,000 hectares (ha) in 2016, from 28,000 ha in 2015. The U.S. government estimated that Mexico's potential production of heroin in 2016 totaled 81 metric tons, three times its estimated production in 2013. In 2016, Mexican forces seized roughly 13 metric tons of cocaine, 26 metric tons of methamphetamine, and about 235 kilograms of opium gum, while shutting down 136 clandestine drug laboratories. The DTOs have been in constant flux in recent years. By some accounts, when President Calderón came to office in December 2006, there were four dominant DTOs: the Tijuana/Arellano Felix organization (AFO), the Sinaloa cartel, the Juárez/Vicente Carillo Fuentes organization (CFO), and the Gulf cartel. Since then, the large, more stable organizations that existed in the earlier years of the Calderón administration have fractured into many more groups. For several years, the U.S. Drug Enforcement Administration (DEA) identified the following organizations as dominant: Sinaloa, Los Zetas, Tijuana/AFO, Juárez/CFO, Beltrán Leyva, Gulf, and La Familia Michoacana. In some sense these might be viewed as the "traditional" DTOs. However, many analysts suggest that those 7 groups now seem to have fragmented to between 9 and as many as 20 major organizations. Today, fragmentation, or "balkanization," of the major crime groups has been accompanied by many groups' diversification into other types of criminal activity. The following section focuses on nine DTOs whose current status illuminates the fluidity of all the crime groups in Mexico as they face new challenges from competition and changing market dynamics. Reconfiguration of the major DTOs—often called transnational criminal organizations, or TCOs, due to their diversification into other criminal businesses—preceded the fragmentation that is so common today. The Gulf cartel, based in northeastern Mexico, had a long history of dominance in terms of power and profits, with the height of its power in the early 2000s. However, the Gulf cartel's enforcers—Los Zetas, who were organized from highly trained Mexican military deserters—split to form a separate DTO and turned against their former employers, engaging in a hyper-violent competition for territory. The well-established Sinaloa DTO, with roots in western Mexico, has fought brutally for increased control of routes through the border states of Chihuahua and Baja California, with the goal of remaining the dominant DTO in the country. Sinaloa has a more decentralized structure of loosely linked smaller organizations, which has been susceptible to conflict when units break away. Nevertheless, the decentralized structure has enabled it to be quite adaptable in the highly competitive and unstable environment that now prevails. Sinaloa survived the arrest of its billionaire founder Joaquin "El Chapo" Guzmán in 2014. The federal operation to capture and detain Guzmán, which gained support from U.S. intelligence, was viewed as a major victory for the Peña Nieto government. Initially the kingpin's arrest did not spawn a visible power struggle within the cartel's hierarchy, as many observers had anticipated. His escape in July 2015 followed by his rearrest in January 2016, however, raised speculation that his role in the Sinaloa cartel might have become more as a figurehead rather than functional leader. The Mexican government's decision to extradite Guzmán to the United States, carried out on January 19, 2017, appears to have led to violent competition from a competing cartel, the Cartel Jalisco-New Generation (CJNG), which had split from Sinaloa. Over 2016 and the early months of 2017, CJNG's quick rise and a possible power struggle inside of Sinaloa between El Chapo's sons and a successor to their father, a longtime associate known as "El Licenciado," or Dámaso López Núñez, reportedly caused increasing violence. In the Pacific Southwest, La Familia Michoacana—a DTO once based in the state of Michoacán and influential in surrounding states—split apart in 2015. It eventually declined in importance as its successor, the Knights Templar, grew in prominence in the region known as the tierra caliente of Michoácan, Guerrero, and in parts of neighboring states Colima and Jalisco (see Figure 2 ). At the same time, CJNG rose to prominence between 2013 and 2015 and is currently deemed by many analysts to be the most dangerous and largest Mexican cartel. CJNG has thrived with the decline of the Knights Templar, which was targeted by the Mexican government. From open-source research, information about the seven "traditional" DTOs (and their successors mentioned above) is more available than about smaller fractions. Current information about the array of new regional and local crime groups, numbering more than 45 groups, is more difficult to assess. The once-coherent organizations and their successors are still operating, both in conflict with one another and at times working cooperatively. A brief sketch follows of each of these nine major organizations, some of which are portrayed in the DEA map in Figure 2 . The AFO is a regional "tollgate" organization that historically has controlled the drug smuggling route between Baja California (Mexico) to southern California. It is based in the border city of Tijuana. One of the founders of modern Mexican DTOs, Miguel Angel Felix Gallardo, a former police officer from Sinaloa, created a network that included the Arellano Felix family and numerous other DTO leaders (such as Rafael Caro Quintero, Amado Carrillo Fuentes, and Joaquín "El Chapo" Guzman). The seven "Arellano Felix" brothers and four sisters inherited the AFO from their uncle, Miguel Angel Felix Gallardo, after his arrest in 1989 for the murder of DEA Special Agent Enrique "Kiki" Camarena. The AFO was once one of the two dominant DTOs in Mexico, infamous for brutally controlling the drug trade in Tijuana in the 1990s and early 2000s. The other was the Juárez DTO, also known as the Carrillo Fuentes Organization. The Mexican government and U.S. authorities took vigorous enforcement action against the AFO in the early years of the 2000s, with the arrests and killings of the five brothers involved in the drug trade—the last of whom was captured in 2008. In 2008, Tijuana became one of the most violent cities in Mexico. That year, the AFO split into two competing factions when Eduardo Teodoro "El Teo" Garcia Simental, an AFO lieutenant, broke from Fernando "El Ingeniero" Sanchez Arellano (the nephew of the Arellano Felix brothers who had taken over the management of the DTO). Garcia Simental formed another faction of the AFO, reportedly allied with the Sinaloa DTO. Further contributing to the escalation in violence, other DTOs sought to gain control of the profitable Tijuana/Baja California-San Diego/California plaza in the wake of the power vacuum left by the earlier arrests of the AFO's key players. Some observers believe that the 2010 arrest of Garcia Simental created a vacuum for the Sinaloa DTO to gain control of the Tijuana/San Diego smuggling corridor. Despite its weakened state, the AFO appears to have maintained control of the plaza through an agreement made between Sanchez Arellano and the Sinaloa DTO's leadership, with Sinaloa and other trafficking groups paying a fee to use the plaza. Some analysts credit the relative peace in Tijuana to a law enforcement success, but it is unclear how large of a role policing strategy played. In 2013, the DEA identified Sanchez Arellano as one of the six most influential traffickers in the region. Following his arrest in 2014, however, Sanchez Arellano's mother, Enedina Arellano Felix, who was trained as an accountant, reportedly took over. It remains unclear if the AFO retains enough power through its own trafficking and other crimes to continue to operate as a tollgate cartel. Violence in Tijuana rose to more than 100 murders a month in late 2016, with the uptick in violence attributed to Sinaloa battling its new challenger, CJNG, according to some analyses. CJNG apparently has taken an interest in both local drug trafficking inside Tijuana and cross-border trafficking into the United States. As in other parts of Mexico, the role of the newly powerful CJNG organization may determine the nature of the area's DTO configuration in coming years. Some analysts maintain the resurgence of violence in Tijuana and the spiking homicide rate in the nearby state of Southern Baja California are linked to CJNG forging an alliance with remnants of the AFO. In 2017, Tijuana had one of the highest numbers of homicides in the country, with close to 6% of all homicide victims, suggesting the violence that receded in 2012 has returned. Sinaloa, described as Mexico's oldest and most established DTO, is comprised of a network of smaller organizations. In April 2009, President Barack Obama designated the notorious Sinaloa Cartel as a drug kingpin entity pursuant to the Kingpin Act. Often regarded as the most powerful drug trafficking syndicate in the Western Hemisphere, the Sinaloa Cartel was at its apex an expansive network; Sinaloa leaders successfully corrupted public officials from the local to the national level inside Mexico and abroad to operate in some 50 countries. Traditionally one of Mexico's most prominent organizations, each of its major leaders was designated a kingpin in the early 2000s. At the top of the hierarchy was Joaquin "El Chapo" Guzmán, listed in 2001, Ismael Zambada Garcia ("El Mayo"), listed in 2002, and Juan Jose "El Azul" Esparragoza Moreno, listed in 2003. By some estimates, Sinaloa had grown to control 40%-60% of Mexico's drug trade by 2012 and had annual earnings calculated to be as high as $3 billion. The Sinaloa Cartel has long been identified by the DEA as the primary trafficker of drugs to the United States. In 2008, a federation dominated by the Sinaloa Cartel (which included the Beltrán Leyva organization and the Juárez DTO) broke apart, leading to a battle among the former partners that sparked the most violent period in recent Mexican history. Since its 2009 kingpin designation of Sinaloa, the United States has attempted to dismantle Sinaloa's operations by targeting individuals and financial entities allied with the cartel. For example, in October 2010, Treasury's Office of Foreign Assets Control identified Alejandro Flores Cacho, along with 12 businesses and 16 members of his financial and drug trafficking enterprise located throughout Mexico and Colombia, as collaborators with Sinaloa. (In August 2017, OFAC identified the Flores DTO and its leader, Raul Flores Hernandez, as Kingpins. ) The Sinaloa Cartel's longtime most visible leader, "El Chapo" Guzmán, escaped twice from Mexican prisons in 2001 and again in 2015. The second escape in July 2015 was a major embarrassment to the Peña Nieto administration, and that incident may have convinced the Mexican government to extradite the alleged kingpin rather than try him in Mexico after his recapture. He is now imprisoned in New York, following the Mexican government's decision to extradite him to the United States in January 2017, the day before President Trump's inauguration. Guzmán was indicted in New York District's federal court and will go on trial for operating a continuing criminal enterprise in September. His lawyers are reportedly preparing to argue that he was not the head of the Sinaloa enterprise and instead a "lieutenant" following orders. After Guzman's trusted deputy "El Azul" Esparragoza Moreno was reported to have died in 2014, the head of the Sinaloa DTO was assumed to be Guzmán's partner, Ismael Zambada Garcia, alias "El Mayo," who is thought to be continuing in that leadership role. Sinaloa may operate with a more horizontal leadership structure than previously thought. Sinaloa operatives control certain territories, making up a decentralized network of bosses who conduct business and violence through alliances with each other and local gangs. Local gangs throughout the region specialize in specific operations and are then contracted by the Sinaloa DTO network. The shape of the cartel in the current criminal landscape is evolving, however, as Sinaloa's rivals eye a formidable drug empire built on the proceeds from trafficking South American cocaine, and locally sourced methamphetamine, marijuana, and heroin to the U.S. market. With rising tensions between the United States and Mexico over trade and immigration, the effect on bilateral cooperation on counternarcotics and security, including the use of extradition and sanctions, may diminish and provide opportunities for renewal for well-seasoned traffickers like some in Sinaloa. A former hegemon in the cartel landscape, Sinaloa is now under pressure and its future remains unclear. Some analysts warn that Sinaloa remains powerful given its dominance internationally and its infiltration of the upper reaches of the Mexican government evident in Guzmán's successful escape through a mile-long tunnel out of a top-security prison. Other analysts maintain that Sinaloa is in decline, citing its breakup into factions and violence from inter- and intra-organizational tensions. CJNG has evidently battled with its former partner, Sinaloa, in a number of regions since 2015, and has been deemed by many authorities Mexico's new most powerful crime syndicate. Based in the border city of Ciudad Juárez in the central northern state of Chihuahua, the once-powerful Juárez DTO controlled the smuggling corridor between Ciudad Juárez and El Paso, TX, in the 1980s and 1990s. By some accounts, the Juárez DTO controlled at least half of all Mexican narcotics trafficking under the leadership of its founder, Amado Carrillo Fuentes. Vicente Carrillo Fuentes, Amado's brother, took over the leadership of the cartel when Amado died during plastic surgery in 1997 and reportedly led the Juárez organization until his arrest in October 2014. In 2008, the Juárez DTO broke from the Sinaloa federation, with which it had been allied since 2002. The ensuing rivalry between the Juárez DTO and the Sinaloa DTO helped to turn Ciudad Juárez into one of the most violent cities in the world. From 2008 to 2011, the Sinaloa DTO and the Juárez DTO fought a "turf war," and Ciudad Juárez experienced a wave of violence with spikes in homicides, extortion, kidnapping, and theft—at one point reportedly experiencing 10 murders a day. From 2008 to 2012, the violence in Juárez cost about 10,000 lives. Reportedly, more than 15% of the population displaced by drug-related violence inside Mexico between 2006 to 2010 came from the border city, while having only slightly more than 1% of Mexico's population. Traditionally a major trafficker of both marijuana and South American cocaine, the Juárez cartel has become active in opium cultivation and heroin production, according to the DEA. Between 2012 and 2013 violence dropped considerably and this was attributed by some analysts to both the actions of the police and to President Calderón's socioeconomic program Todos Somos Juáre z , or We Are All Juarez. Other analysts credit the Sinaloa DTO with success in its battle over the Juarez DTO after 2012. They consider Sinaloa's dominance, perhaps abetted by local authorities, to be the reason for the relatively peaceful and unchallenged control of the border city despite the Juárez DTO's continued presence in the state of Chihuahua. Many residents who fled during the years of intense drug-related violence remain reluctant to return to Juárez and cite the elevated homicide rate as one reason. Indeed, the El Paso and Juárez transit route again appears to be in flux with the rise in killings on the Mexican side of the border in 2016 and 2017. Based in the border city of Matamoros, Tamaulipas, with operations in other Mexican states on the Gulf side of Mexico, the Gulf DTO was a transnational smuggling operation with agents in Central and South America. The Gulf DTO was the main competitor challenging Sinaloa for trafficking routes in the early 2000s, but it now battles its former enforcement wing, Los Zetas, over territory in northeastern Mexico. The Gulf DTO reportedly has split into several competing gangs and some analysts no longer consider it a whole entity and maintain that it is so fragmented that factions of its original factions are fighting. The Gulf DTO arose in the bootlegging era of the 1920s. In the 1980s, its leader, Juan García Abrego, developed ties to Colombia's Cali cartel as well as to the Mexican federal police. García Abrego was captured in 1996 near Monterrey, Mexico. His violent successor, Osiel Cárdenas Guillén, successfully corrupted elite Mexican military forces to become his hired assassins. Those corrupted military personnel became known as Los Zetas when they fused with the Gulf cartel. In the early 2000s, Gulf was considered one of the most powerful Mexican DTOs. Cárdenas was arrested by Mexican authorities in March 2003, but he continued to run his drug enterprise from prison until his extradition to the United States in 2007. Tensions between the Gulf DTO and Los Zetas culminated in their split in 2010. Antonio "Tony Tormenta" Cárdenas Guillén, Osiel's brother, was killed that year, and leadership of the Gulf went to another high-level Gulf lieutenant, Jorge Eduardo Costilla Sanchez, also known as "El Coss," until his arrest in 2012. Exactly what instigated the Zetas and Gulf split has not been determined, but the growing strength of the paramilitary group and its leader was a factor, and some analysts say the Zetas blamed the Gulf DTO for the murder of a Zeta close to their leader, which sparked the rift. Others posit the split happened earlier, but the Zetas organization that had brought both military discipline and sophisticated firepower to cartel combat was clearly acting independently by 2010. Regardless, the ensuing bitter conflict between the Gulf DTO and Los Zetas has been identified as the "most violent in the history of organized crime in Mexico." Mexican federal forces identified and targeted a dozen Gulf and Zeta bosses they believed responsible for the wave of violence in Tamaulipas in the spring and summer of 2014. Analysts have reported that the structures of both the Gulf DTO and Los Zetas have been decimated by federal action and combat between each other, and both groups now operate largely as fragmented cells that do not communicate with each other and often take on new names. From 2014 through 2016, some media sources outside of the state of Tamaulipas and anonymous social media accounts from within Tamaulipas reported daily kidnappings, daytime shootings, and burned-down bars and restaurants in towns and cities such as the port city of Tampico. Like the Zetas, fragmented cells of the Gulf DTO have expanded into other criminal operations, such as fuel theft and widespread extortion. This group originally consisted of former elite airborne special force members of the Mexican Army who defected to the Gulf DTO and became its hired assassins. Although Zeta members are part of a prominent transnational DTO, their main asset is not drug smuggling but organized violence. They have amassed significant power to carry out an extractive business model—thus generating revenue from crimes, such as fuel theft, extortion, human smuggling and kidnapping, that are widely seen to inflict more suffering on the Mexican public than transnational drug trafficking. Los Zetas had a significant presence in several Mexican states on the Gulf (eastern) side of the country, and extended their reach to Ciudad Juárez (Chihuahua) and some Pacific states, and operate in Central and South America. More aggressive than other groups, Los Zetas used intimidation as a strategy to maintain control of territory, making use of social media and public displays of bodies and body parts to send messages to frighten Mexican security forces, the local citizenry, and rival organizations. Sometimes smaller gangs and organizations use the "Zeta" name to tap into the benefits of the Zeta reputation or "brand." Unlike many other DTOs, Los Zetas have not attempted to win the support of local populations in the territory in which they operate, and they have allegedly killed many civilians. They are linked to a number of massacres, such as the 2011 firebombing of a casino in Monterrey that killed 53 people and the 2011 torture and mass execution of 193 migrants who were traveling through northern Mexico by bus. Los Zetas are known to kill those who cannot pay extortion fees or who refuse to work for them, often targeting migrants. In 2012, Mexican marines killed longtime Zeta leader Heriberto Lazcano (alias "El Lazca"), one of the founders of Los Zetas, in a shoot-out in the northern state of Coahuila. The capture of his successor, Miguel Angel Treviño Morales, alias "Z-40," notorious for his brutality, in July 2013 by Mexican federal authorities was a second blow to the group. Some analysts date the beginning of the "loss of coherence" of Los Zetas to Lazcano's killing and consider the ensuing arrest of Treviño Morales to be the event which accelerated the group's decline. In March 2015, Treviño Morales's brother Omar, who was thought to have taken over leadership of Los Zetas, also was arrested in a joint operation by the Mexican federal police and military. According to Mexico's attorney general, federal government efforts against the cartels through April 2015, hit the Zetas the hardest, with more than 30 of their leaders removed. Los Zetas are known for their diversification and expansion into other criminal activities, such as fuel theft, extortion, kidnapping, human smuggling, and arms trafficking. According to media coverage, Pemex, Mexico's state oil company, announced that it lost more than $1.15 billion in 2014 due to oil tapping and it has remained over $1 billion a year in losses since. In early 2017, the Atlantic Council released a report estimating that Los Zetas control about 40% of the market in stolen oil. Los Zetas resisted government attempts to curtail their sophisticated networks for the oil and gas that they stole. Most incidents of illegal siphoning occur in the Mexican Gulf states of Tamaulipas and Veracruz. Although many dispute the scope of the territory now held by Los Zetas factions and how that fragmentation influenced the formerly cohesive group's prospects, most concur that the organization is no longer as powerful as it was during the height of its dominance in 2011 and 2012. Before 2008, BLO was part of the Sinaloa federation and controlled access to the U.S. border in Mexico's Sonora state. The Beltrán Leyva brothers developed close ties with Sinaloa head Joaquin "El Chapo" Guzmán and his family, along with other Sinaloa-based top leadership. The January 2008 arrest of BLO's leader, Alfredo Beltrán Leyva, through intelligence reportedly provided by Guzmán, triggered BLO's split from the Sinaloa DTO. The two organizations have remained bitter rivals since. The organization suffered a series of setbacks at the hands of the Mexican security forces, beginning with the December 2009 killing of Arturo Beltrán Leyva, followed closely by the arrest of Carlos Beltrán Levya. In 2010, the organization broke up when the remaining brother, Héctor Beltrán Leyva, took the remnants of BLO and rebranded it as the South Pacific ( Pacifico Sur ) cartel. Another top lieutenant, Edgar "La Barbie" Valdez Villarreal, took a faction loyal to him and formed the Independent Cartel of Acapulco, which he led until his arrest in 2010. The South Pacific cartel appeared to retake the name Beltrán Leyva Organization and achieved renewed prominence under Hector Beltrán Leyva's leadership, until his arrest in October 2014. Splinter organizations have arisen since 2010, such as the Guerreros Unidos and Los Rojos , among at least five others with roots in BLO. Los Rojos operates in Guerrero and relies heavily on kidnapping and extortion for revenue as well as trafficking cocaine, although analysts dispute the scope of its involvement in the drug trade. The Guerreros Unidos traffics cocaine as far north as Chicago in the United States and reportedly operates primarily in the central and Pacific states of Guerrero, México, and Morelos. The Guerreros Unidos, according to Mexican authorities, was responsible for taking the 43 Mexican teacher trainees, who were handed to them by local authorities in Iguala, Guerrero; the group subsequently murdered the students and burned their bodies. The lack of a hegemonic DTO in Guerrero has led to significant infighting between DTO factions and brutal intra-cartel competition, resulting in the state of Guerrero having the highest number of homicides and kidnappings in the country in 2013 and the second most after the state of México in 2014. In the 2017 NDTA, DEA maintains that the Guerreros Unidos are known to traffic heroin and other drugs into the United States. Like other DTOs, the BLO was believed to have infiltrated the upper levels of the Mexican government for at least part of its history, but whatever reach it once had likely has declined significantly after Mexican authorities arrested many of its leaders. According to the 2017 National Drug Threat Assessment , BLO relies on its alliances with the CJNG, the Juárez cartel and elements of Los Zetas to move drugs across the border and maintain distribution points in the U.S. cities of Phoenix, Los Angeles, Chicago, and Atlanta. Inside of Mexico, it remains influential in the states of Morelos, Guerrero, Nayarit, and Sinaloa. Based originally in the Pacific state of Michoacán, LFM traces its roots back to the 1980s. Formerly aligned with Los Zetas before the group's split from the Gulf DTO, LFM announced its intent to operate independently from Los Zetas in 2006, declaring that LFM's mission was to protect Michoacán from drug traffickers, including its new enemies, Los Zetas. From 2006 to 2010, LFM acquired notoriety for its use of extreme, symbolic violence, military tactics gleaned from the Zetas, and a pseudo-ideological or religious justification for its existence. LFM members reportedly made donations of food, medical care, schools, and other social services to benefit the poor in rural communities to project a populist "Robin Hood" image. In 2010, however, LFM played a less prominent role, and in November 2010, LFM reportedly called for a truce with the Mexican government and announced it would disband. A month later, spiritual leader and co-founder Nazario "El Más Loco" Moreno González reportedly was killed, although authorities claimed his body was stolen. The body was never recovered, and Moreno González reappeared in another shootout with Mexican federal police in March 2014, after which his death was officially confirmed. Moreno González had been nurturing the development of a new criminal organization that emerged in early 2011, calling itself the Knights Templar and claiming to be a successor or offshoot of LFM. Though "officially" disbanded, LFM remained in operation, even after the June 2011 arrest of leader José de Jesús Méndez Vargas (alias "El Chango"), who allegedly took over after Moreno González's disappearance. Though largely fragmented, remaining cells of LFM are still active in trafficking, kidnapping, and extortion in Guerrero and Mexico states, especially in the working-class suburbs around Mexico City through 2014. Observers report that LFM had been largely driven out of Michoacán by the Knights Templar, although a group calling itself the New Family Michoacan, La Nueva Familia Michoacana , has been reported to be active in parts of Guerrero and Michoacán. As a DTO, LFM has specialized in methamphetamine production and smuggling, along with other synthetic drugs. It also has been known to traffic marijuana and cocaine and to tax and regulate the production of heroin. The Knights Templar began as a splinter group from La Familia Michoacana, announcing its presence in Michoacán in early 2011. Similar to LFM, the Knights Templar began as a vigilante group, claiming to protect the residents of Michoacán from other criminal groups, such as the Zetas, but in reality operated as a DTO. The Knights Templar is known for the trafficking and manufacture of methamphetamine, but the organization also moves cocaine and marijuana north. Like LFM, it preaches its own version of evangelical Christianity and claims to have a commitment to "social justice," while being the source of much of the insecurity in Michoacán and surrounding states. In 2013, frustration with the perceived ineffectiveness of Mexican law enforcement in combating predatory criminal groups led to the birth in Michoacán of " autodefensa " or self-defense organizations, particularly in the tierra caliente region in the southwestern part of the state. Composed of citizens from a wide range of backgrounds—farmers, ranchers, businessmen, former DTO operatives, and others—the self-defense militias primarily targeted members of the Knights Templar. Local business owners, who had grown weary of widespread extortion and hyper-violent crime that was ignored by corrupt local and state police, provided seed funding to resource the militias in Michoacán, but authorities cautioned that some of the self-defense groups had extended their search for resources and weapons to competing crime syndicates, such as the Cártel Jalisco New Generation ( Cartel Jalisco Nueva Generación [CJNG]). Despite some analysts' contention that ties to rival criminal groups are highly likely, other observers are careful not to condemn the entire self-defense movement. These analysts acknowledge some gains in the effort to combat the Knights Templar that had not been made by government security forces, although conflict between self-defense groups also has led to violent battles. The Knights Templar reportedly has emulated LFM's penchant for diversification into other crime, such as extortion. The Knights Templar battled the LFM, and by 2012 its control of Michoacán was nearly as widespread as LFM's once had been, especially by demanding local businesses pay it tribute through hefty levies. According to avocado growers in the rural state who provide more than half the global supply, the LFM and the Knights Templar have seriously cut into their profits. The Knights Templar also moved aggressively into illegal mining, such as mining iron ore from illegally operated mines. Through mid-2014, the Knights Templar reportedly had been using Mexico's largest port, Lázaro Cárdenas, located in the southern tip of Michoacán, to smuggle illegally mined iron ore, among other illicit goods. Analysts and Mexican officials, however, suggest that a 2014 federal occupation of Lázaro Cárdenas resulted in an "impasse," rendering DTOs unable to receive and send shipments. In early 2014, the Mexican government began its controversial policy of incorporating members of the self-defense groups into legal law enforcement, giving them the option to disarm or register themselves and their weapons as part of the "Rural Police Force," despite concerns about competing cartels corrupting these forces or the potential for the groups to morph into predatory paramilitary forces, as occurred in Colombia." The federal police and the Rural Police Force had a brief successful period of cooperation, which ended with the arrests of the two self-defense force leaders (as well as dozens of members) in late spring 2014. The arrests sparked tension between the self-defense movement and federal police, contributing to a renewal of high rates of violence in the area. The Mexican government and self-defense forces delivered heavy blows to the Knights Templar, especially with the confirmed killing in March 2014 of Nazario Moreno González, who led the Knights, and the killing of Enrique Plancarte, another top leader, several weeks later. Previously, the self-defense forces and the Knights Templar reportedly had split Michoacán roughly into two, although other criminal organizations continued to operate successfully in the area. In late February 2015, the Knights Templar DTO leader Servando "La Tuta" Gomez was captured. The former schoolteacher had taken risks by being interviewed in the media. With La Tuta's arrest, the fortunes of the Knights Templar plummeted. But new spinoff groups or fragments of other cartels filled the void, including the rise of such groups as Los Viagras, and they contested the state with the Cartel Jalisco (see below, " Cartel Jalisco-New Generation (CJNG) " ). In March 2017, the alleged leader of Los Viagras, José Carlos Sierra Santana, was killed. The Mexican government quickly reinforced troops and federal police forces in the state to prevent a bloodbath as cartels struggled to assert new patterns of dominance. Originally known as the Zeta Killers, the CJNG made its first appearance in 2011 with a roadside display of the bodies of 35 alleged members of Los Zetas. The group is based in Jalisco state with operations in central Mexico, including the states of Colima, Michoacán, Mexico State, Guerrero, and Guanajuato. It has grown into a dominant force in the states of the Tierra Caliente , including Guerrero and Michoacán. Reportedly, it has been led by many former associates of slain Sinaloa DTO leader Ignacio "Nacho" Coronel, who operated his faction in Jalisco until he was killed by Mexico's security forces in July 2010. CJNG has early roots in the Milenio cartel, which was active in the t ierra c aliente region of southern Mexico before it disintegrated in 2009. The group is a by-product of the Milenio cartel's collapse and was allied with the Sinaloa federation until 2014. CJNG reportedly served as an enforcement group for the Sinaloa DTO until the summer of 2013. Analysts and Mexican authorities have suggested the split between Sinaloa and CJNG is one of the many indications of a general fragmentation of crime groups. Ruben Oseguera Cervantes, alias "El Mencho," a top wanted fugitive by the DEA, is the group's current leader. The Mexican military delivered a blow to the CJNG with the July 2013 capture of its leader's deputy, Victor Hugo "El Tornado" Delgado Renteria. In January 2014, the Mexican government arrested the leader's son, Rubén Oseguera González (also known as "El Menchito"), believed to be CJNG's second-in-command. However, El Menchito, who has dual U.S.-Mexican citizenship, was released in December 2014 due to lack of evidence in a federal case. Captured again in late June 2015, El Menchito was again released by a judge. On July 3, 2015, he was rearrested by Mexican authorities; he is being held in the Miahutlan, Oaxaca, maximum-security prison. In 2015, the Mexican government declared CJNG one of the most dangerous cartels in the country and one of two with the most extensive reach. In October 2016, the U.S. Department of the Treasury echoed the Mexican government when it described the group as one of the world's "most prolific and violent drug trafficking organizations." According to some analysts, CJNG has operations throughout the Americas, Asia, and Europe. The group allegedly is responsible for distributing cocaine and methamphetamine along "10,000 kilometers of the Pacific coast in a route that extends from the Southern Cone to the border of the United States and Canada." To best understand CJNG's international reach, it is important to first consider its expansion within Mexico. Analysts contend that CJNG has presence in 14 states throughout the country, a combined area that makes up nearly half of Mexico. Recent reports indicate the group has pushed into Aguas Calientes, San Luis Potosi, and Zacatecas states. The group has battled Los Zetas and Gulf cartel factions in Tabasco, Veracruz, and Guanajuato, and it has battled the Sinaloa federation in the Baja peninsulas and Chihuahua. CJNG's ambitious expansion campaign has led to high levels of violence, particularly in Ciudad Juarez and Tijuana, where it has clashed with the Sinaloa federation for control of the lucrative heroin trade and corresponding smuggling routes. The group also has been linked to several mass graves in southwestern Mexico and was responsible for shooting down an army helicopter in 2015, the first successful takedown of a military asset of its kind in Mexico. CJNG's efforts to dominate key ports on both the Pacific and Gulf Coasts have allowed it to consolidate important components of the global narcotics supply chain. In particular, CJNGs asserts control over the ports of Veracruz, Mazanillo, and Lazaro Cardenas, which has given the group access to precursor chemicals that flow into Mexico from China and other parts of Latin America. As a result, the CJNG has been able to pursue an aggressive growth strategy, underwritten by U.S. demand for Mexican methamphetamine and heroin. Despite leadership losses, CJNG has extended its geographic reach and maintained its own cohesion while exploiting the splintering of the Sinaloa organization. As stated earlier, the DTOs today are more fragmented and more competitive than in the past. However, analysts disagree about the extent of this fragmentation, its importance, and whether the group of smaller organizations will be easier to dismantle. Fragmentation that began in 2010 and accelerated in 2011 redefined the "battlefield" and brought new actors, such as Los Zetas and the Knights Templar, to the fore. In 2018, an array of smaller organizations is active, and some of the once-small groups, such as CJNG, have exploded into the space left after other DTOs were dismantled. Recently, some analysts have identified CJNG as a cartel with national reach like the Sinaloa DTO, although it originally was an allied faction or the armed wing of Sinaloa organization. A newer cartel, known as Los Cuinis, also was identified as a major organization in 2015. In April 2015, the U.S. Department of the Treasury's Office of Foreign Assets Control (OFAC) named both CJNG and Los Cuinis as Specially Designated Narcotics Traffickers under the Foreign Narcotics Kingpin Designation Act. According to an OFAC statement, the traditional DTOs in Mexico are being replaced by new organizations that are becoming "among the most powerful drug trafficking organizations in Mexico." Other analysts view the fragments as the cause of heightened violence, but note that groups which "survived the cartel breakups" have been less able to conduct transnational drug trafficking. Contrary to the experience in Colombia in the 1980s and 1990s with the sequential dismantling of the enormous Medellin and Cali cartels, fragmentation in Mexico has been associated with resurging violence. A "kingpin strategy" implemented by the Mexican government has incapacitated numerous top- and mid-level leaders in all the major DTOs, either through arrests or deaths in arrest efforts. However, this strategy with political decentralization contributed to violent succession struggles, shifting alliances among the DTOs, a proliferation of new gangs and small DTOs, and the replacement of existing leaders and criminal groups by even more violent ones. The ephemeral prominence of some new gangs and DTOs, regional changes in the power balance between different groups, and their shifting allegiances often catalyzed by government enforcement actions make it difficult to portray the current Mexican criminal landscape. The Stratfor Global Intelligence group contends that the rival crime networks are best understood in regional groupings, and at least four geographic identities emerged in 2014 and early 2015. Those umbrella groups are Tamaulipas state, Sinaloa state, tierra caliente regional group, and perhaps another umbrella group emerging along the southeastern coast of Mexico split off from the Tamaulipas umbrella group. (See Figure 3 .) Some believe diversification of the DTOs and their evolution into poly-crime outfits may be evidence of organizational vitality and growth. Others contend that diversification signals that U.S. and Mexican drug enforcement measures are cutting into profits from drug trafficking or constitutes a response to shifting U.S. drug consumption patterns and policies, such as legalization of marijuana in some states and heightened demand for plant based and synthetic opioids. The growing public condemnation of the DTOs also may be stimulated by the organizations' diversification into street crime, which causes more harm to average Mexican civilians than intra- and inter-DTO violence related to conflicts over drug trafficking. Because the DTOs have diversified, many analysts now refer to them as transnational criminal organizations, organized crime groups, or simply mafias. Others maintain that much of their nondrug criminal activity is in service of the central drug trafficking business. The current crime organization landscape is exceptionally fluid, yet several analysts are attempting to define it. Sam Logan and James Bosworth describe the increasing multiplication of groups: The tendency for criminal groups in Mexico is toward small and local ... as the number of well-armed criminal groups jumps from the six significant groups we counted in 2006 ... to over 10 in 2012 with a steady growth of new groups to bring the total to possibly over 20 by the end of 2014. Analyst Eric Olson of the Woodrow Wilson Center for International Scholars believes the DTOs are more accurately described as "organized crime groups" and notes that these groups are extremely local in character, although they are engaged in diverse criminal activity. (Many of the actors have diversified beyond the transnational drug trade, as noted above.) Mexican political scientist Eduardo Guerrero-Gutiérrez developed a useful typology of different DTOs in 2015 (see Table 1 ). He defines four types of DTOs: national cartels, regional cartels, toll-collector cartels, and drug trafficking cells. In 2015, Guerrero had identified more than 200 organizations across the country in the final category. Some of these groups do not participate solely in drug trafficking-related violence but also are engaged in what he terms "mafia-ridden" violence. The goal of the Mexican government's counter-DTO strategy has been to diminish the extent and character of the DTOs' activity from a national-security threat to a law-and-order problem and, once this is achieved, to transfer responsibility for addressing this challenge from military forces back to the police. President Peña Nieto did not succeed in reducing the scope of the military in its domestic policing function. Instead, the Mexican military has been challenged by accusations of extrajudicial executions by members of its forces and also for the use of torture and other severe human rights violations. The government remains challenged by the corruption of politicians by DTOs, such as the former governor of Veracruz alleged to have fostered a "state of terror" during his administration, and he is among 14 sitting and former governors accused of deep corruption in office. In the wake of the six years under the PRI, some towns have experienced serious displacement; they are often described as ghost towns. They include towns close to the border in Texas in the states of Coahuila and Tamaulipas; and in the heart of Mexico's Golden Triangle of drug cultivation, especially the state of Sinaloa. The splintering of the large criminal organizations has driven violence, according to several analysts. A key cause of the violence has been the transition to a post-Sinaloa cartel dominated-era, with the rise of a lucrative heroin trade and synthetic opioids, such as fentanyl, causing renewed conflict. Nevertheless, some observers remain convinced of the capacity of the Sinaloa DTO, and the newly predominant CJNG, to use their well-established bribery and corruption to operate with impunity in Mexico. Many U.S. government officials and policymakers have deep concerns about the Mexican government's capacity to decrease the violence in Mexico and curb the power of the country's criminal groups. Many analysts have viewed as problematic the current government's continued reliance on a controversial kingpin strategy. They note while it has reduced the violence in some cases, it has not lowered violence in a sustainable way. For some observers, Mexico's DTO challenge remains largely an organized crime or mafia problem, coupled with endemic corruption. Accordingly, these analysts contend that the most important tools for managing the problem include long-term institutional reform to replace a culture of illegality and corruption with one of rule of law and respect for lawful authority. The prospects for strengthening U.S.-Mexican security cooperation, including the future of the Mérida Initiative, remain unclear. The new administration in Mexico may be less willing to adapt to the changing approaches of the U.S. government, and could demand changes in the bilateral relationship or be uncooperative unless treated as a respected partner.

Summary: Mexican drug trafficking organizations (DTOs) pose the greatest crime threat to the United States, according to the U.S. Drug Enforcement Administration's (DEA's) National Drug Threat Assessment published in October 2017. These organizations have for years been identified for their strong links to drug trafficking, money laundering, and other violent crimes. These criminal groups have trafficked heroin, methamphetamine, cocaine, marijuana, and, increasingly, the powerful synthetic opioid fentanyl. U.S. overdoses due to opioid consumption sharply increased to a record level in 2016, following the Mexican criminal syndicates expanded control of the heroin and synthetic opioids market. The major DTOs and new crime groups have furthered their expansion into such illicit activity as extortion, kidnapping, and oil theft that costs the government's oil company more than a billion dollars a year. Mexico's DTOs have also been in constant flux. Early in his term, former Mexican President Felipe Calderón (2006-2012) initiated an aggressive campaign against Mexico's drug traffickers that was a defining policy of his government and one that the DTOs violently resisted. By some accounts, in 2006, there were four dominant DTOs: the Tijuana/Arellano Felix organization (AFO), the Sinaloa cartel, the Juárez/Vicente Carillo Fuentes organization (CFO), and the Gulf cartel. Government operations to eliminate DTO leadership sparked organizational changes, which led to significant instability among the groups and continued violence. In recent years, larger and more stable organizations have fractured, leaving the DEA and other analysts to identify seven organizations as predominant: Sinaloa, Los Zetas, Tijuana/AFO, Juárez/CFO, Beltrán Leyva, Gulf, and La Familia Michoacana. In some sense, these organizations include the "traditional" DTOs, although the 7 organizations appear to have fragmented further to at least 9 (or as many as 20) major organizations. A new transnational criminal organization, Cartel Jalisco-New Generation, which split from Sinaloa in 2010, has sought to become dominant with brutally violent techniques. During the term of President Enrique Peña Nieto that will end in 2018, the government has faced an increasingly complex crime situation that saw violence spike. In 2017, Mexico reached its highest number of total intentional homicides in a year, exceeding, by some counts, 29,000 murders. In the 2017-2018 electoral season according to a Mexican security consultancy recording political violence, 152 office holders and political candidates (and pre-candidates) were killed, allegedly by crime bosses and others in an effort to intimidate public office holders. If non-elected public officials are included, victims in the 2018 electoral season exceed 500. On July 1, 2018, Andrés Manuel López Obredor won the election for President by as much as 30 points over the next contender. He leads a new party, Morena, but has served as Mayor of Mexico City and comes from a leftist ideological viewpoint. López Obredor campaigned on fighting corruption and finding new ways to combat crime and manage the illicit drug trade. U.S. foreign assistance for Mexico in the Consolidated Appropriations Act, 2018 (P.L. 115-141) totaled $152.6 million, with more than $100 million of that funding focused on rule of law and counternarcotics efforts. The 115th Congress pursued oversight of security conditions inside of Mexico and monitored the Mexican criminal organizations not only because they are the major wholesalers of illegal drugs in the United States but also to appraise their growing control of U.S. retail-level distribution. This report examines how the organized crime landscape in Mexico has been altered by fragmentation of criminal groups and how the organizational shape-shifting continues. For more background, see CRS In Focus IF10867, Mexico's 2018 Elections; CRS Report R41349, U.S.-Mexican Security Cooperation: The Mérida Initiative and Beyond; and CRS In Focus IF10400, Transnational Crime Issues: Heroin Production, Fentanyl Trafficking, and U.S.-Mexico Security Cooperation.