We consistently hear people say something akin to “they can’t replace Joe Biden.” It’s a little odd, because I’m really not sure where that level of understanding DC comes from.
Replacing Joe Biden on the ballot before or after the November 2024 election is as simple as one typed sentence from his doctor saying he is not capable of fulfilling another term. Not complicated. Very simple. Can happen at any time. The DNC corporation appoints a replacement, the leftists rally sympathy around him, and Biden is escorted away for a life of indulgences and free stuff. Easy peasy.
According to congressional Representative Anna Paulina Luna, the DC democrats discuss this move frequently.