Single-member district
Single-member district describes the current arrangement for electing national and state legislators in the United States in which one candidate is elected in each legislative district; the winner is the candidate with the most votes. The “single-member” system allows only one party to win in any given district. Under the proportional system popular in Europe, much larger districts are used and several members are elected at one time, based on the proportion of votes their parties receive. Read more about Single-member district