Disagree. Once the Republican party is gone, the Democrat part will split. We won't be a one party country for long.
Frankly, maybe it's well past time for them both to go and probably we'll be better off with more political parties.
Right now, and for a good long while, the biggest draw to the Democrat party is that it's not Republican party. It's not the party flirting with fascism, insisting we all fillow their each religious beliefs, or give white supremacy another big thumbs up.
Tgose are the primary things holding the Democratic party together. Once the big baddie self emulates, which can't happen soon enough imho, the Democratic party will drift apart based on their differences. And it'll happen pretty quick.