Mexico Is Gonna Sue Us.

Cut them off, completely, not just from cash, from all help, technology, military; all forms of scientific, economic, intellectual, pharmaceutical, agricultural, you name it... no help.
Until they can pay back ALL they owe us and then pay for anything they ask for, after dropping any suit, NOTHING, EVER...no matter what.
Ingrates.
Also, don't just drop people off across the boarder, air-lift their ass all the way down to an island off the coast of the Yucatan Peninsula.