Redistricting in the United States is the process of drawing electoral district boundaries. For the United States House of Representatives, and state legislatures, redistricting occurs after each decennial census.
The U.S. Constitution in Article 1, Section 2, Clause 3 provides for proportional representation in the House of Representatives. The Reapportionment Act of 1929 required that the number of seats in the U.S. House of Representatives be kept at a constant 435, and a 1941 act made the reapportionment among the states by population automatic after every decennial census. Reapportionment occurs at the federal level followed by redistricting at the state level. According to , Article I, Section 4 left to the legislature of each state the authority to establish congressional districts; however, such decisions are subject to judicial review. In most states redistricting is subject to political maneuvering, but some state legislatures have created independent commissions.
The Uniform Congressional District Act (enacted in 1967) requires that representatives be elected from single-member districts. When a state has a single representative, that district will be state-wide.
Gerrymandering in the redistricting process has been a problem since the early days of the republic. In recent years, critics have argued that redistricting has been used to neutralize minority voting power. Supporters say it enhances electoral competitiveness.
Six states have a single representative in the United States House of Representatives, because of their low populations. These are Alaska, Delaware, North Dakota, South Dakota, Vermont, and Wyoming. These states do not need redistricting for the House and elect members on a state-wide at-large basis.
In 25 states, the state legislature has primary responsibility for creating a redistricting plan, in many cases subject to approval by the state governor.
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Discute des propriétés souhaitables des méthodes électorales, des méthodes multi-gagnantes, de la représentation de district, du gerrymandering et de la tyrannie de la majorité.
thumb|400px|Système électoral utilisé pour élire la chambre basse par pays. Système majoritaire Système semi-proportionnel Système proportionnel Système mixte Autre Le 'système électoral, mode de scrutin', système de vote ou régime électoral, désigne tout type de processus permettant l'expression du choix d'un corps électoral donné, souvent la désignation d'élus pour exercer un mandat en tant que représentants de ce corps (élection), ou moins souvent le choix direct (référendum) d'une option parmi plusieurs.
Le des États-Unis (2010 United States Census) mené à bien par le bureau du recensement des États-Unis recense la population résidente aux États-Unis au jour du à . Cela représente un accroissement de 9,7 % par rapport aux comptés lors du recensement de 2000. L’État dans lequel le taux de croissance de la population est le plus élevé est le Nevada, alors que l’État dont la population a le plus augmenté est le Texas.
Apportionment is the process by which seats in a legislative body are distributed among administrative divisions, such as states or parties, entitled to representation. This page presents the general principles and issues related to apportionment. The page Apportionment by country describes specific practices used around the world. The page Mathematics of apportionment describes mathematical formulations and properties of apportionment rules. The simplest and most universal principle is that elections should give each voter's intentions equal weight.
Life-cycle assessment (LCA) is a method for evaluating the environmental impacts of products holistically, including direct and supply chain impacts. The current LCA methodologies and the standards by the International Organization for Standardization (ISO ...