My friend is not. As we've seen from the primary, about 20% of Republicans are not. I don't know how many of them could never vote for Biden, but that is the audience I have in mind. As to the swing voters in the swing states - Independents and Republicans - enough of them gave Biden the win. I don't know how many of them are persuaded by the Democrats are a threat to democracy. However many there are, they are also the audience.