Argument: Primaries help parties define their agendas
- "The Primaries’ Premature Nomination Problem". FairVote.org. September 28th, 2007 - "They want a good sense of a candidate’s grasp of the issues, ability to handle adversity, and even their regional strengths. They also can take this chance to fully debate the potential future direction of their party, which is more 'in play' in the presidential nomination contests than any other part of our politics."
- US Supreme Court Justice Antonin Scalia wrote an opinion in 1999 on California Democratic Party, et al. v. Jones, Bill, CA Secy of State - "In no area is the political association’s right to exclude more important than in the process of selecting its nominee. That process often determines the party’s positions on the most significant public policy issues of the day."