For some reason, Republicans refuse to understand that voter fraud is almost non-existent. The problem is the opposite: vote suppression.
So, apropos of Trump's push for a commission to investigate this imaginary vote-fraud (which seems to just be a fishing expedition to collect information), there is this editorial:
The Bogus Voter-Fraud Commission
The truth can’t be repeated often enough: The Presidential Advisory Commission on Election Integrity, which held its first meeting last week, is a sham and a scam. It was born out of a marriage of convenience between conservative anti-voter-fraud crusaders, who refuse to accept actual data, and a president who refuses to accept that he lost the popular vote fair and square...
https://www.nytimes.com/2017/07/22/o...?smid=fb-share
It goes on to mention that one of the programs it uses has a 99% error rate(!) and that over the years that Kris Kobach has been pursing this, he achieved a grand total of only nine convictions for double-voting, mostly Republicans.