Not that they really vote, but China?
Perhaps, the farmers are poor. I've been to China several times, but only to the richest parts so I don't have an intimate knowledge of the impoverished parts. It's tough to judge China, after many decades of state-controlled information flow and a thoroughly venal, capitalistic version of Communism.
During the 20th century the campesinos in Latin America supported leftism while their wealthier urban compatriots lean right. Was this still the case when you were there? In my two visits to Peru I observed that anti-corporatism was still popular in the country, but urban dwellers I visited with were much more commercially oriented. I have also visited Mexico probably 20 times over the past 30 years and I have found that urban-dwellers are the most PAN-friendly. (You have to be careful when observing election returns from Mexico because there remains a north/south divide, with areas north of Mexico's central valley having closer economic ties to the US and therefore supporting the PAN in greater percentages than those to the south, but generally urban areas are wealthier and more likely to support PAN.)
I observed this urban/rural divide to some extent in Guatemala and Bolivia as well but not as much, probably because those countries are very poor and therefore much more leftist in general, even in the cities. In both of those countries, I have witnessed huelgas in the city and in the country. The other small countries I've visited in Latin America have a history of this condition as well, but I haven't really stayed in any of them long enough to make a thorough study.
In fact, I think that generally around the world it has been the case that urban dwellers are more commercial, more Americanized, and more business oriented, while country folk are more collectivist and more socialist. The opposite situation exists only in a few countries (The United States being one of them.) Obviously, any analysis is compounded by regional differences. In Africa, tribal, ethnic, and religious differences probably trump economic ones when voting, so you have northern Nigeria and southern Nigeria at odds for example, but in general, you will find the greatest support for commercialism and capitalism in those areas where the greatest concentration of folks have become wealthy, and those areas are urban. The countryside is filled with farmers who are likely to be much more collectivist. They are also probably the least educated and the least likely to have access to information and conveniently-located polling places, so studying election returns might not be the best way to analyze this.
Left and right are odd terms for Argentina, but I would generally say that Buenos Aires is the center of classical liberalism in the country, with the rural areas being quite diverse, from the nationalist left to the nationalist right.
Uruguay, I am unsure. The feeling I got was that the city is more socially liberal, but I wouldn't say there's a huge divide. Peeperkorn would know.
As for Chile... Well, the division is more north/south really. Santiago has a very significant amount of right wing support, but also a fair whack from the left. Valparaiso is unequivocally leftist, but Vina del Mar is equally right wing. I'd say on balance that the cities other than Santiago lean left quite a bit compared to the rural areas, but Santiago itself is hard to say, and probably leans slightly to the right of the average.
