I live somewhere with 2 Republicans on the ballot for one seat with no write in line.
I could have not voted at all on that item, but that wouldn't have helped anybody but the worst of the two candidates.
I poured through more interviews and candidate statements from these two trashy people than any other candidate I voted for, just to find the one that was the least evil.
I still hate them both, but I voted for one to try and stem the bleeding because that's how our Democracy works.