Larry Jr. Started with the same geographical set of voters- Bill Clinton Democrats (business oriented) and mostly GOPe Republicans.
In recent years, the radical left has taken over Montgomery Country, PG County, and Baltimore City. But Hogan has a coalition from his roots in Baltimore country, rural MD, and a few non-radical Democrats that put him over the top.
It has been well know, the Democrats would gerrymander districts with enough blacks to elect a Democrat, but not enough to elect a Black Democrat - as a percentage, blacks are under represented in the MD house.
If Jealous (who is black loses) in a state where Democrats outnumber Republicans 2-1, you could see them sit out a future election.
There are few people more aptly named than Benjamin Jealous.