From 2012, but certainly still happening:
"Just hours before voters go to the polls in the battleground state of Nevada, a national group has announced it plans to file a complaint regarding illegal immigrants purportedly being allowed to vote.
"We want to stop the felonious thefts of American elections," says William Gheen, ALIPAC's president.
Gheen points to a commentary published in Sunday's Las Vegas Review Journal. In it, editorial writer Glenn Cook accuses the Culinary Union 226 of knowingly registering illegal immigrants and then pressured them to vote.
Cook quotes an unidentified illegal immigrant who is on the Clark County voter rolls. The person claims a union representative told them they were "in so much trouble" for refusing to vote.
Gheen says Senate Majority Leader Harry Reid, D-Nevada, would have been ousted in 2010 if not for illegal immigrants voting. A complaint by loser Sharon Angle did not overturn the results."
foxnews.com/politics/allegation-of-unions-putting-illegal-immigrants-on-voter-rolls-clouds-nevada-voting