研究表明: 非公民投票严重影响了Trump的popular vote in 2016.
http://www.investors.com/politics/editorials/did-votes-by-noncitizens-cost-trump-the-2016-popular-vote-sure-looks-that-way/
In 2008, as many as 5.7 million noncitizens voted in the election. In 2012, as many as 3.6 million voted, the study said.
In 2016, the U.S. Census Bureau estimates that there were 21.0 million adult noncitizens in the U.S., up from 19.4 million in 2008. It is therefore
highly likely that millions of noncitizens cast votes in 2016.