Another factor: Mexico has a porous southern border with Central America, which is in EXTREME poverty.
Note that most of Calderon's support comes from the northern half and the Yucatan, which are the most prosperous parts of Mexico. The southern part is Obrador country.
And closer to VZ - Hugo has had his minions working the southern part of Mexico on Obrador's behalf, to such an extent that the Mexican govt even filed a formal protest.
Yep.
The best thing for Mexico is a strong leader who has some ideas about how to make Mexico prosperous.
Fox was neither and bent to the feudal aspects of the Mexican society too often.
The most pro-Obrador place is actually the Federal District where he is leading 2:1 (370 thousand vs. 185 for Calderon). In the rest of South, he's only leading by 5-10%.