Contrary to persistent Republican claims, individual voter fraud has been found to be rare and of no impact on election results. The risk of heavy fines and even imprisonment for fraudulent voting, is a deterrent in itself.
On the other hand, voter fraud with intended, and potentially real, impact on election results, are the massive and usually Republican initiated attempts at limiting access to voting places, purging of registration files, installing unnecessary and for many burdensome identification requirements, etc. That those attempts are aimed at Democrats, is too obvious.
Republican hopeful Donald Trump has already announced that if he doesn’t win, it will be due to voter fraud.
Of course, if not enough Democratic voters are prevented from voting, he will lose and go down in utter disgrace, hopefully taking GOP and Congress majority with him.