If the Dems had a reason to push him out of office, or something to gain from trying, he will be pushed... but there's nothing for them to gain.
The only thing Harris offers the Dem establishment is that she would be the first female president. Outside of that, she's a power-grabbing enigma. She doesn't have a cadre of long time confidantes and advisors who come from establishment institutions, she doesn't have a track record or a donor base that she's reliably beholden to, she could spin in any direction at any time. The establishment has already shown it is willing to go to amazing levels to cover over and ignore Biden's diminished state because as long as they get what they want from the administration, it doesn't matter how far along he is in his decline.
But they are not getting what they want. He’s just a wrecking ball. Watching his interview with George Stephanopolous, he’s damaged. He was on thin ice, and this debacle is the deal breaker. The video of him twisting an eight year old girls nipple, and the girl now confirming it, I bet they all saw it and realize this guy is scum. He’s now a grenade with a loose pin, bouncing around, and they know it. They need him off the stage, ASAP.
And they all know he was taking bribes from China, through his son. The guy is a ticking bomb.