Following Donald Trump’s surprise victory in the presidential election, voter security experts began privately discussing their concerns about whether the results might have been tampered with, according to John Bonifaz, the founder of the National Voting Rights Institute. The election had taken place against a backdrop of warnings from the US government that Russian hackers were “scanning and probing” the election systems of American states, and were behind the theft of emails from the Democratic National Committee and John Podesta, the chairman of Hillary Clinton’s presidential campaign. Eight days before the election, the White House had used an emergency hotline to warn Russia against further interference. “I was getting calls from members of the election integrity community, so I joined them and began looking at possible discrepancies myself,” Bonifaz said in an interview. Several concerns emerged. Trump appeared to have performed particularly well in Wisconsin counties only using electronic voting. There seemed to have been a sharp increase in the number of ballots cast in Michigan that left the presidential field blank. Electronic voting systems had briefly faltered in one North Carolina county on election day.