90% voting democrat is a big problem
Therein lies the Democrat existential problem.
There is in America an Afro Heritage minority-minority. A fairly small shift in black votes effectively ends the Democrat party.
If the 90% Black vote becomes say 85% or more, it is all over for progressives. The minority-minority will prevail.
To prevent the loss, everyday all democrats Kiss Black Ass in every possible way to prevent existential extermination