- (Possible) Governor of Maryland Anthony G Brown
Currently serving as the state's Lieutenant Governor, he's likely to have a fight with the state's Attorney General, who wants to make an issue of the fact that Brown backed Hillary in 2008. Brown may help with African-American turnout, and has an impressive background with pro-bono legal accomplishments and a solid military career.
Any reason we are discounting Heather Mizeur?
I don't think it will be a woman simply because we've never had an all female ticket and a female president has a higher chance at happening first.