How about Reconquista in reverse?

We give the leftist Mexican president an ultimatum. Either clean up his act and country, or we invade and declare Mexico under a state of occupation and martial law. We send in the military to restore order and eliminate the cartels.

"The time for war has not yet come, but it will come and that soon, and when it does come, my advice is to draw the sword and throw away the scabbard." Gen. T.J. Jackson, March 1861