Of course, the Communistas in Mexico City would have to worry about a U.S. invasion. Something that the Pentagon still has plans for. Under the RAINBOW system, where each country had a color, Mexico's was Green, and thus the plans for Mexico (at least in the 1940s) were the GREEN Plans. GREEN-SIX was the most developed: all-out invasion, and not stopping until getting to Mexico City. There would be a lot of pressure to invade and "restore freedom and democracy" from both sides of the aisle in D.C., not to mention governors of border states (who would have problems handling those Mexicans who find being Red isn't a good thing).