Democrats are perfectly happy to commit voter fraud, so I wouldnt be surprised if this was a case of Democrat email fraud.
If I understand correctly what happened here, Cornish received 2,897 E-Mails regarding gun control bills under consideration. He received 5 E-Mails in FAVOR of gun control, and 2,892 E-Mails AGAINST gun control. If there was Democrat fraud here, the 5 E-Mails he received in favor of gun control would have come from one person.