The dems would be nuts to run anyone but a minority in 2020, preferably male. I don’t think minority males turn out for a minority female like they would a male. The difference in the minority turnout between Clinton and Obama would have won the 2016 election for the dems.
Freegards
I think there is a lot of pent-up resentment from black men towards black women. Black women get double-preferences under affirmative action, both for college and employment, then display disdainful attitudes towards black men over their relative lack of success.
In 2016 exit polls, 13% of black men voted for Trump, but only 4% of black women.
I would add that the Dems are ripe for a fracture along sex/race lines. If there's a black woman running, and she gets pushed aside by the party bosses in favor of a black male, look for some fireworks.