Single-member district in the context of "Additional-member system"

An electoral (congressional, legislative, etc.) district, sometimes called a constituency, riding, or ward, is a geographical portion of a political unit, such as a country, state or province, city, or administrative region, created to provide the voters therein with representation in a legislature or other polity. That legislative body, the state's constitution, or a body established for that purpose determines each district's boundaries and whether each will be represented by a single member or multiple members. Generally, only voters (constituents) who reside within the district are permitted to vote in an election held there. The district representative or representatives may be elected by single-winner first-past-the-post system, a multi-winner proportional representative system, or another voting method.

The district members may be selected by a direct election under wide adult enfranchisement, an indirect election, or direct election using another form of suffrage.

An interregnum (plural interregna or interregnums) is a period of discontinuity or "gap" in a government, organization, or social order. Archetypally, it was the period of time between the reign of one monarch and the next (coming from Latin inter-, "between" and rēgnum, "reign" [from rex, rēgis, "king"]), and the concepts of interregnum and regency therefore overlap. Historically, longer and heavier interregna have been typically accompanied by widespread unrest, civil and succession wars between warlords, and power vacuums filled by foreign invasions or the emergence of a new power.

The term also refers to the periods between the election of a new parliament and the establishment of a new government from that parliament in parliamentary democracies, usually ones that employ some form of proportional representation that allows small parties to elect significant numbers, requiring time for negotiations to form a government. In the UK, Canada and other electoral systems with single-member districts, this period is usually very brief, except in the rare occurrence of a hung parliament as occurred both in the UK in 2017 and in Australia in 2010. In parliamentary interregnums, the previous government usually stands as a caretaker government until the new government is established. Additionally, the term has been applied to the United States presidential transition, the period of time between the election of a new U.S. president and their inauguration, during which the outgoing president remains in power, but as a lame duck.

28°37′2″N 77°12′29″E / 28.61722°N 77.20806°E / 28.61722; 77.20806The Parliament of India (ISO: Bhāratīya Saṁsada) is the supreme legislative body of the Government of the Republic of India. It is a bicameral legislature composed of the Rajya Sabha (Council of States) and the Lok Sabha (House of the People). The President of the Republic of India, in their role as head of the legislature, has full powers to summon and prorogue either house of Parliament or to dissolve the Lok Sabha, but they can exercise these powers only upon the advice of the Prime Minister of the Republic of India and the Union Council of Ministers.

Those elected or nominated (by the president) to either house of the Parliament are referred to as members of Parliament (MPs). The members of parliament in the Lok Sabha are directly elected by the voting of Indian citizens in single-member districts and the members of parliament in the Rajya Sabha are elected by the members of all state legislative assemblies by proportional representation. The Parliament has a sanctioned strength of 543 in the Lok Sabha and 245 in the Rajya Sabha including 12 nominees from the expertise of different fields of literature, art, science, and social service. The Parliament meets at Sansad Bhavan in New Delhi. The Parliament of India represents the largest democratic electorate in the world (the second being the European Parliament), with an electorate of 968 million eligible voters in 2024. On 28 May 2023, Prime Minister Narendra Modi, unveiled and inaugurated the New Parliament Building (Sansad Bhavan), located adjacent to the previous one.

Plurality voting is an electoral system in which the candidates in an electoral district who poll more than any other (that is, receive a plurality or relative majority) are elected.

Under single-winner plurality voting, and in systems based on single-member districts, plurality voting is called single member [district] plurality (SMP), which is occasionally known as "first-past-the-post". In plurality voting the leading candidate, whether or not they have a majority of votes, is elected. Under all but a few niche election systems, the most-popular are elected. But under systems that use ranked votes, vote tallies change and are compared at various times during the vote count process. Where votes are transferred, the system is not generally referred to as a plurality system.

Local government is the third level of government in Australia, administered with limited autonomy under the states and territories, and in turn beneath the federal government. Local government is not mentioned in the Constitution of Australia, and two referendums in 1974 and 1988 to alter the Constitution relating to local government were unsuccessful. Every state and territory government recognises local government in its own respective constitution. Unlike the two-tier local government system in Canada or the United States, there is (largely) only one tier of local government in each Australian state/territory, with no distinction between counties and cities.

Local government in Australia is generally run by an elected council, and the area it administers is referred to by the Australian Bureau of Statistics as a local government area or LGA, each of which encompasses multiple suburbs and/or localities (roughly equivalent to neighbourhoods), often of different postcodes. LGAs are variously styled using terms such as "city", "town", "district", "municipality", "borough", "region" or "shire". These usually have geographic or historical significance, and there is rarely any legal distinction between them. For instance, cities and municipalities tend to apply to councils in urban and metropolitan areas, whereas districts and shires are found primarily in rural and regional areas. A local government area is also commonly known as a "city council", "local council", or simply a "council". Council members are generally known as councillors, and the head of a council is called the mayor, chairman or shire president. Some of Australia’s largest cities, such as Sydney, Melbourne, Brisbane, Perth and Adelaide, use the historical title of lord mayor. Councillors are usually elected from single-member districts known as divisions or wards, whilst the mayor or president is directly elected by all the voters within that council area. However, the mayor is often entitled to style themselves as a councillor, and is considered an ex officio member of the council. As of August 2016, there were 547 local councils in Australia.

Third party, or minor party, is a term used in the United States' two-party system for political parties other than the Democratic and Republican parties. The Electoral College for presidential elections and the plurality voting system for most other elections have established a two-party system in American politics. Third parties are most often encountered in presidential elections and while third-party candidates rarely win elections, they can have an effect on them through vote splitting and other impacts.

With few exceptions, the U.S. system has two major parties which have won, on average, 98% of all state and federal seats. According to Duverger's law two main political parties emerge in political systems with plurality voting in single-member districts. In this case, votes for minor parties can potentially be regarded as splitting votes away from the most similar major party. Third party vote splitting exceeded a president's margin of victory in three elections: 1844, 2000, and 2016.