James Clyburn said he would on board for Biden dropping out only if Kamala Harris becomes the presidential nominee. So if Kamala isn’t on top of the ticket, black support will crater for the Democrats.
Kamala Harris is not as “black” as Michelle Obama. Her mother is an Asian Indian and her father is a Jamaican of mixed race. If Michelle runs and wins the nomination, Kamala could be bought off, perhaps for a Supreme Court seat or the governorship of California plus substantial remuneration. Michelle will do better in holding the black vote. She could be made an offer she cannot refuse. After the attempt to kill Trump, Kamala may well listen.