South Carolina Democratic primary: How does it work?
The 2020 race is heading to the South.
The 2020 primary race is heading to South Carolina for the nation's First in the South nominating contest.
The South Carolina primary tests candidates' strength with black voters, who made up nearly two-thirds of the Democratic primary electorate in 2016.
The state also boasts a nearly-perfect track record; since Democrats in the state first used a primary in 1992, every winner except for one has gone on to win the Democratic nomination. The exception: Neighboring-state favorite John Edwards, who won South Carolina but ultimately lost the nod to John Kerry.
https://www.nbcnews.com/politics/2020-election/south-carolina-democratic-primary-how-does-it-work-n1143631