For the intercontinental crowd, that nation is Ecuador, where no passport or visa (IIRC) is required when arriving via international flights.
With lots of US taxpayer-supplied foreign aid money channeled to scores of grifting "church" charities and the like (who probably send laundered tithes back to their benefactors, and who also probably have to "purchase" "insurance" from various cartels and syndicates that they coexist with to successfully complete the terms of their human trafficking contracts), the 3rd world foreigners (military assets likely seeded among them) that take advantage of this are shepherded north through Columbia and the Darian Gap of Panama, then on through the rest of Central America and Mexico, and finally to the pot of golden freebies waiting for them after they set foot across the US border.
I suspect the leaders of Ecuador are not just innocent libertarians. They need to be party to a reality check from the new administration.
New president of Equator visited the inauguration.
I would say, done deal!