On Tuesday, November 26, President Donald Trump revealed that his administration was three months into a process of designating as Foreign Terrorist Organizations at least some Mexican drug trafficking cartels. To date, the FTO designation has been applied mostly to Islamic terrorist groups regarded as a significant threat to U.S. national security. An FTO designation triggers powerful American authorities to freeze financial assets, prosecute for activities that support terrorism, and bar entry into the country. Applying an FTO designation to Mexican cartels is not a new idea and has proven controversial as a public policy. In these two posts, CIS fellows Dan Cadman and Todd Bensman present arguments for and against the FTO designation for Mexican cartels.