We're not sure what to "look at" when it comes to millions of fraudulent votes, because as we have said, there have been only a few reports of people voting twice or on behalf of a dead person. As for noncitizens voting, Trump has in the past referred to a controversial and disputed study penned by two Old Dominion University professors and published in the journal Electoral Studies, which analyzed a national election survey in which some people self-identified as noncitizens, but indicated that they voted. The two professors estimated, based on extrapolating figures from the survey to a national audience, that 6.4 percent of noncitizens voted in 2008 and 2.2 percent of noncitizens voted in 2010.