What is a caucus?

A caucus is best defined as a gathering of party members to select candidates or decide policy. In the political context, caucuses are often held at various levels, such as local or state, where party members come together to discuss their political views, strategize, and decide on candidates for upcoming elections. This process gives party supporters an opportunity to engage in dialogue about the direction of their party and can also serve as a preliminary method for selecting delegates for larger conventions.

In contrast, the other choices represent different political concepts and processes. A national election for presidential candidates refers to a general election in which all eligible voters participate to choose their preferred candidate, which takes place after primary events, including caucuses. A formal vote by the general populace is indicative of a referendum or general election process, rather than the party-centric focus of a caucus. Altering voting districts is related to redistricting, a process often determined by state legislatures or judicial decisions, not by party gatherings focused on nomination and policy. Thus, the definition of a caucus as a gathering for selection and policy-making is accurate and reflects its unique role within the political system.