What makes it difficult for candidates like Harrison to win is the fear factor that the GOP has successfully ginned up in its base, for decades, that has made them afraid of a socialist "Boogeyman," even though 8 out of 10 South Carolinians couldn't find socialism in the dictionary, if you spotted them the first four letters; they just know that it's bad. Like, the attack ads against Harrison would just be calling him a radical leftist, or a socialist, or some shit, and showing pictures of him next to AOC, Biden and Pelosi (whom, for some reason, are also considered "radical leftists," in South Carolina), and that would be enough.
It's the same here: Perdue ran ads that said shit like, "Jon Ossoff is too extreme for Georgia!" And I'm like, Jon Ossoff is too extreme for Georgia?!