The reason I think they want Harris gone is to select a VP nominee who will step into the White House immediately if Biden should win.
“The reason I think they want Harris gone is...”
I suspect Harris has some integrity:
“My vision of a progressive prosecutor was someone who used the power of the office with a sense of fairness, perspective, and experience, someone who was clear about the need to hold serious criminals accountable and who understood that the best way to create safe communities was to prevent crime in the first place. To do those things effectively, you also need to run a professional operation.”
https://www.politico.com/magazine/story/2019/01/24/kamala-harris-2020-history-224126/