Here's how the Democrats select delegates:
"Delegates and Alternates must be equally divided between men and women.
The delegate selection process is open to all Democrats who are registered voters. The SC Democratic Party encourages participation by members of groups that are underrepresented in party affairs, including African Americans, Hispanics, ethnics, youth, those over 65, gay men and lesbians, persons with physical disabilities, and persons of low and moderate income.
Our goal is to elect a delegation that is at least 50% African American, as well as at least 3 GLBT delegates and 5 who are under 30. The election of At-Large delegates may be used to reach this goal."
The party of equal opportunity selects by race, sexual practice and age. Why not simply select the best people?