How do political parties influence the selection of candidates?

Political parties influence the selection of candidates through various organizational structures and mechanisms, though the process often reflects an underlying oligarchical tendency where party leaders play a decisive role.12

The methods for selecting candidates generally fall into three categories:

• Cadre Parties: Candidates are selected by committees of party activists or caucuses. In some systems, this is decentralized to local committees, while in others, it is centralized under a national caucus.1
• Mass-Based Parties: Selection is formally made by members through regional or national congresses. However, governing committees typically maintain essential control, with local members often merely ratifying leadership choices.12
• Primary Elections: Common in the United States, this system allows party members or voters within a district to choose candidates. These may be direct, where voters choose the candidate, or indirect, where voters select delegates who then nominate candidates at a convention.13

While these processes appear democratic, they often provide only a partial limitation on the power of party elites. Furthermore, in the U.S., the shift toward candidate-centered elections has allowed some individuals to circumvent traditional party organizations, particularly if they possess significant personal wealth.14