The poll, which was conducted from July 7 to July 9, found that 73 percent of Democratic voters “somewhat” or “strongly” approve of Harris as Biden’s replacement. In an earlier iteration of the same survey, conducted from July 3 to July 6, a 66 percent majority of Democrats approved of Harris as a replacement.
Biden already possesses a huge amount of donor money, and cannot run again in the future. Additionally, Biden gets almost half his money from small donors.
https://www.opensecrets.org/2024-presidential-race/small-donors
Influence gained by donation and control are not the same thing. Influence is real. Control is conspiracy theory bullshit.