It absolutely comes from Mexico and the precursors do come from China/ maybe India, but it’s hard to think Mexico or China are doing it to harm the United States and not the United States using it as a reason to continue the militarization of the police force, which leaves only one conclusion. America is the one either producing or overseeing the production of fentanyl. Considering the connection between American law enforcement and cartels is pretty open it’s hard to dispute.