Non-Citizens Used to Be Able to Vote in U.S. Elections. Here’s What Changed

After months of President Donald Trump alleging that he lost the popular vote in the 2016 presidential election because millions of people — including undocumented immigrants — voted illegally, his Presidential Advisory Commission on Election Integrity will meet for the first time on Wednesday with the mission of investigating "improper voter registrations and improper voting, including fraudulent voter registrations and fraudulent voting.