This really needs explaining? Her comments about Assassinating the President were seen as quite extreme by most people, they got her fired off all the network news gigs she had at the time (including her longtime role on CNN's new years event), and were re purposed by the GOP for the Ossoff race to great success.
People swayed by an ad about a comedian saying stupid stuff weren't going to vote for Ossoff even if he ran against Roy Moore.
If Kathy Griffin was their excuse for voting Republican, bless their hearts.