For certain countries like Cuba and Iran, where relations are colder, there are "reciprocity tables" which give fees and restrictions for immigrants from there

For certain countries like Cuba and Iran, where relations are colder, there are "reciprocity tables" which give fees and restrictions for immigrants from there based on making comparable requirements to what their country requires of Americans. https://travel.state.gov/content/travel/en/us-visas/Visa-Reciprocity-and-Civil-Documents-by-Country.html/ https://travel.state.gov/content/travel/en/us-visas/Visa-Rec...