Mexico needs to be strong-armed, they are a huge trade partner.

Trump's Coming War On The Mexican Drug Cartels.

If Mexico fails to help or take over these tasks themselves, Trump could unmask the Mexican politicians who cooperate with the cartels, entirely close the border, impose tariffs on Mexico, and impose a naval blockade to stop precursor shipments. https://www.zerohedge.com/geopolitical/trumps-coming-war-mexican-drug-cartels