Executive summary Since 2013, China has been the principal source of the fentanyl flooding the U.S. illicit drug market—or of the precursor agents from which fentanyl is produced, often in Mexico—fueling the deadliest drug epidemic in U.S. history. Both the Obama and Trump administrations devoted significant diplomatic capital to persuading China to crack down on … Continue reading Fentanyl and geopolitics: Controlling opioid supply from China