Presidents are chosen by democratic politics and the traction behind the idea that Biden could step aside and, following discourse and debate, designate a viable successor shows that a lot of people who don't think they have West Wing brain really actually do
My personal take (and I know I'm risking a scorching) is that an argument can be made for the democratic legitimacy of Kamala Harris stepping in as Biden's successor/replacement — since she shared the ticket with him in 2020 and in the 2024 primaries — and for absolutely nobody else.
