I really don't understand how MS Dems can't scrounge together a candidate who can squeak out a win more or less running as an old school Southern Democrat. With such a large Black population, all he'd need to do is win like 30% of Whites, right? There's no way a coalition of old Dixiecrats who are about to die plus some poor Whites can't get near 30%...
Generally the only way to attract those extra 20% of whites to the Democratic Party again would be moving heavily to the right, which would in turn decrease black turnout. That wouldn't even be enough, because if you want a conservative governor, why not just vote Republican? It would require a Republican candidate that was bad enough that people want an alternative.