LOL. ISIS v. Cartel.
steel cage match. loser leaves town!
In real life, of course, two strong players won't be fighting each other on command of a weakling. It just doesn't happen this way. Cartels want access to the market - which is people. Cartels have no use of the US government in any way, shape or form. ISIS fights against that government, distracting it from border control (a difficult task, considering that border control is nonexistent.) Cartels and ISIS are natural allies.