How does a lie come to be widely taken as the truth?

The answer is disturbingly simple: Repeat it over and over again. When faced with facts that contradict the lie, repeat it louder.

This, in a nutshell, is the story of claims of voting fraud in America — and particularly of voter impersonation fraud, the only kind that voter ID laws can possibly prevent.

Last week, a Washington Post-ABC News poll found that nearly half of registered American voters believe that voter fraud occurs “somewhat” or “very” often. That astonishing number includes two-thirds of people who say they’re voting for Donald Trump and a little more than one-quarter of Hillary Clinton supporters. Another 26 percent of American voters said that fraud “rarely” occurs, but even that characterization is off the mark. Just 1 percent of respondents gave the answer that comes closest to reflecting reality: “Never.”

As study after study has shown, there is virtually no voter fraud anywhere in the country. The most comprehensive investigation to date found that out of one billion votes cast in all American elections between 2000 and 2014, there were 31 possible cases of impersonation fraud. Other violations — like absentee ballot fraud, multiple voting and registration fraud — are also exceedingly rare. So why do so many people continue to believe this falsehood?