d sons who succeeded him, turned the trafficking of tons of drugs into a multimillion-dollar business. Despite the arrests of many of its leaders, the cartel and its allied gangs maintained control of a vast infrastructure for smuggling illegal shipments into the U.S..

According to Mexican analyst David Saucedo, the designation is key to enabling the United States to take more decisive action along the border, where two other groups both located at the eastern end of the border with Texas - the Gulf Cartel and the Northeast Cartel - were declared terrorist organizations in February 2025.

The US again targets Michoacan

Los Viagras is a local cartel in the western state of Michoacan, which is already home to two other criminal groups designated as terrorist organizations: Cárteles Unidos and La Nueva Familia Michoacana.

Los Viagras emerged following the 2013-2014 armed uprising led by farmers who succeeded in driving out many of the old cartels, only to see them replaced by new ones.

The cartel is led by Nicolás Sierra Santana, who faces a formal indictment in the District of Columbia for conspiracy to traffic drugs, filed in June 2025. The State Department is offering a $5 million reward for information leading to his capture.

The group has shifted its loyalties and alliances to consolidate its regional control of the territory through extortion. It also produces synthetic drugs, which sells to other cartels that traffic them into the United States.