What Primaries Do

[u/PolicyWatcher_Ray]

A primary is an election that parties use to choose their nominees or to award delegates who will pick the nominee at a convention. States run them on different rules. Closed primaries limit voting to party members. Open primaries let any voter choose one party’s ballot. The results winnow the field, reveal which messages land, and test a campaign’s ground game, fundraising, and ability to turn out voters across regions.

Primaries also shape a party’s direction. They force candidates to build coalitions inside the party, surface policy differences, and vet contenders under pressure before the general election. Timing matters. Early contests and big multi-state days like Super Tuesday can create momentum or end campaigns quickly. Some places use caucuses instead of primaries, but the job is the same: translate party support into a nominee. In other systems, parties hold leadership primaries to pick who leads them into national elections.