is making a first campaign stop. not in iowa or new hampshire, but in south carolina for her national sorority. >> what does this sisterhood mean politically? >> it is a fact that there are close to 300,000 women in the sorority, incorporated, and that is a fact. so it doesn't -- it is not rocket science. >> reporter: these translate into votes and bringing other people in? >> i think that's a fair assessment. >> reporter: these women are the foot soldiers of a powerful voting bloc. cnn exit polling shows black women supported democrats more than almost any other voting subgroup, helping drive democratic wins in last year's midterms. a fellow sister, the first black woman to enter the 2020 fray. >> it translates into a ready made group of people who will come when she calls. >> reporter: this isn't just a friendship or sisterhood. we're talking about political