"It is neither wise nor realistic to round up millions of people, many with deep roots in the United States and send them across the border, " he said.
The isolated keys aren't as deep as those found on Sony's latest models, nor not quite as crisp as an Apple keyboard, but should make for a comfortable typing experience.
He says that Mexico's deep inequalities mean that the PRD cannot just be a moderate European centre-left party, but nor can it be so radical as to become a movement outside the country's institutions.