Primary election

A primary election is an election in which people in a political party can choose their party's candidate for a future general election.

They are used in many places in the world. It started in the United States during the progressive movement. People tried to take the power of picking a candidate away from party leaders.

Types
General
There are two general types of primary elections: 
Closed primary, where only people in the party can vote.
 Open primary, where anyone can vote in the primary.

References

Category:Types of elections