Politicians and voting rights advocates continue to clash over whether photo ID and other voting requirements are needed to prevent voter fraud, but a News21 analysis and recent court rulings show little evidence that such fraud is widespread. A News21 analysis four years ago of 2,068 alleged election-fraud cases in 50 states found that while some fraud had occurred since 2000, the rate was infinitesimal compared with the 146 million registered voters in that 12-year span. The analysis found only 10 cases of voter impersonation, the only kind of fraud that could be prevented by voter ID at the polls. This year, News21 reviewed cases in Arizona, Ohio, Georgia, Texas and Kansas, where politicians have expressed concern about voter fraud, and found hundreds of allegations but few prosecutions between 2012 and 2016. Attorneys general in those states successfully prosecuted 38 cases, though other cases may have been litigated at the county level. At least one-third of those cases involved nonvoters, such as elections officials or volunteers. None of the cases prosecuted was for voter impersonation. “Voter fraud is not a significant problem in the country,” Jennifer Clark of the Brennan Center, a public policy and law institute, told News21. “As the evidence that has come out in some recent court cases and reports and basically every analysis that has ever been done has concluded: It is not a significant concern.”