From the Summary: "Mexican drug trafficking organizations (DTOs) pose the greatest crime threat to the United States and have 'the greatest drug trafficking influence,' according to the U.S. Drug Enforcement Administration's (DEA's) annual 'National Drug Threat Assessment.' These organizations, often referred to as 'transnational criminal organizations' (TCOs), continue to diversify into crimes of extortion, human smuggling, and oil theft, among others. Their supply chains traverse the Western Hemisphere and the globe.Their extensive violence since 2006 has caused Mexico's homicide rate to spike. They produce and traffic illicit drugs into the United States, including heroin, methamphetamine, marijuana, and synthetic opioids such asfentanyl, and they traffic South American cocaine. Mexican DTO activities significantly affect the security of both the United States and Mexico. As Mexico's DTOs expanded their control of the opioids market, U.S. overdoses rose sharply, according to the Centers for Disease Control, setting a record in 2019 with more than 70% of overdose deaths involving opioids, including fentanyl. Many analysts believe that Mexican DTOs' role in the trafficking and producing of opioids is expanding."
CRS Report for Congress, R41576
Congressional Research Service: https://crsreports.congress.gov/