Is this something that el presidente nieto should be worried about?
And since when did US citizens even care about what the mexicans think about US elections? They have NO say in the matter whatsoever.
Since "motor voter" made it easy for non-citizens to register to vote. Non-citizen voters could make the difference in the election.
The Democrats whine about the 2000 election because Gore lost despite "winning the popular vote" (only a plurality, not a majority), but if you subtracted all the ineligible voters who voted, or the voters who voted multiple times for Gore, it's possible that Bush had a plurality.