- (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.
No. You should look at the bold. I meant Heather Mizeur for Governor of Maryland. MisterMets seemed to indicate that the 2014 Democratic Primary for Governor of Maryland would be a fight solely between Anthony Brown and Doug Gansler.
I'm not very familiar with a Democratic primary in Maryland. The main point about Brown was that he still has to win his primary, and that it looks competitive.
That said, it is quite uncommon for someone to get elected to significant statewide office (IE- Governor or Senator) from the lower house of the state legislature, especially without a leadership post there. It's not impossible, as Governors Robert Bentley of Alabama and Nikki Haley of South Carolina demonstrate.