Mexico Taking Democracy Lessons from US?

Word from South of the border is that millions of voters were disenfranchised in the recent election, mostly poor voters likely to cast ballots for the opposition candidate. Did the governing party rig the election, copying GOP tactics that worked so effectively in the past couple of U.S. presidential elections? After all, the lesson of the U.S. elections is clear, whoever has the power and the will to disenfranchise voters likely to support the other candidate gets to be the chief executive officer and provide all sorts of direct monetary (and other) benefits to their cronies. Quite an incentive for those not stymied by moral impediments.