A study of 2,068 alleged election-fraud cases in 50 states between 2000 and 2012 found the level of fraud was infinitesimal compared with the 146 million voters registered over the 12-year period.

The analysis found only 10 cases of voter impersonation, the only kind of fraud that could be prevented by voter ID at the polls.

In further analysis conducted 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.