voter id requirements in Mexico ?

good point on the state versus federal distinction in US. Just trying to understand why in US, all states can't issue ids unrelated to driving etc that would eliminate the problem when it comes to voting. Living in Alaska when not in Zihua, I understand
how people in remote locations are at a disadvantage in getting prompt access.

That's the crux of the problem for Statesiders. Several Southern states have already shown us the process they intend to use by limiting access, which disproportionately affects poor minorities. In contrast, Mexico's federal government tries to make access to getting a Credencial as easy as possible for everyone by locating an INE office in every municipio.