Since Donald Trump won the Electoral College vote in November, our new commander-in-chief has consistently attacked the legitimacy of popular vote totals that showed his rival, Hillary Clinton, well ahead of him on election day. “In addition to winning the Electoral College in a landslide, I won the popular vote if you deduct the millions of people who voted illegally,” Trump tweeted in November. Although he has doubled down on the claim in several subsequent statements, offering an estimate of three to five million illegal votes and complaints about specific states, Trump has failed to provide evidence of widespread fraud. Myrna Pérez, a Texas native and civil rights lawyer, won’t take the president at his word. As head of the Voting Rights and Elections project at New York University’s Brennan Center for Justice, Pérez has seen states around the country—Texas included—rushing to respond to voter fraud threats. “As someone who’s driven by data, as someone who researches elections, as someone who is in the business of making sure our elections represent the voices of actual Americans, I’m very troubled at the policies we see that seem to not have any science or data behind them,” Pérez says.