Oopsie!
So much for this particular talking point that the GQP latched onto:
"Donald Kirk Hartle, a Republican, had claimed that someone voted in the 2020 election by using the mail-in ballot of his wife, who died in 2017. He now faces two counts of voter fraud."
https://www.nytimes.com/2021/10/23/us/voter-fraud-nevada.html