If someone votes in 2020, then tries to off a candidate in 2024 and dies before they can vote in 2024, absolutely they are a voter.
Your argument is that someone who is politically active up until their death and doesn’t pull a Jesus to vote after death is a nonvoter?
No, a voter is some who voted.
To you, nonvoter includes people who voted. You’re just a version of chatGPT with no conscious awareness prior to the year 2024.