could deval eat into bidens share of the black vote?
I don't think he's going to do much of anything tbh. Black voters looking for identity-based Biden alternatives already have a reasonable and solid person in Cory Booker, and haven't carried him far enough in the polls. Deval's a much more problematic candidate in the old style of democrats as an executive of an investment company. If Booker is an Obama-lite, Deval's even more of one with baggage.