Bicameralism Article

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A bicameral legislature divides the legislators into two separate assemblies, chambers, or houses. Bicameralism is distinguished from unicameralism, in which all members deliberate and vote as a single group, and from some legislatures that have three or more separate assemblies, chambers, or houses. As of 2015, fewer than half the world's national legislatures are bicameral. [1]

Often, the members of the two chambers are elected or selected by different methods, which vary from country to country. This can often lead to the two chambers having very different compositions of members.

Enactment of primary legislation often requires a concurrent majority – the approval of a majority of members in each of the chambers of the legislature. When this is the case, the legislature may be called an example of perfect bicameralism. However, in many Westminster system parliaments, the house to which the executive is responsible can overrule the other house and may be regarded as an example of imperfect bicameralism. Some legislatures lie in between these two positions, with one house only able to overrule the other under certain circumstances.

History of bicameral legislatures

The Palace of Westminster, seat of the UK Parliament
The United States Capitol, seat of Congress

The Founding Fathers of the United States favoured a bicameral legislature. The idea was to have the Senate be wealthier and wiser. Benjamin Rush saw this though, and noted that "this type of dominion is almost always connected with opulence". The Senate was created to be a stabilising force, elected not by mass electors, but selected by the State legislators. Senators would be more knowledgeable and more deliberate—a sort of republican nobility—and a counter to what Madison saw as the "fickleness and passion" that could absorb the House. [2]

He noted further that "The use of the Senate is to consist in its proceeding with more coolness, with more system and with more wisdom, than the popular branch." Madison's argument led the Framers to grant the Senate prerogatives in foreign policy, an area where steadiness, discretion, and caution were deemed especially important. [2] State legislators chose the Senate, and senators had to possess significant property to be deemed worthy and sensible enough for the position. In 1913, the 17th Amendment passed, which mandated choosing Senators by popular vote rather than State legislatures. [2]

As part of the Great Compromise, they invented a new rationale for bicameralism in which the Senate had states represented equally, and the House had them represented by population.

The British Parliament is often referred to as the Mother of Parliaments (in fact a misquotation of John Bright, who remarked in 1865 that "England is the Mother of Parliaments") because the British Parliament has been the model for most other parliamentary systems, and its Acts have created many other parliaments. [3] Many nations with parliaments have to some degree emulated the British "three-tier" model. Most countries in Europe and the Commonwealth have similarly organised parliaments with a largely ceremonial head of state who formally opens and closes parliament, a large elected lower house, and a smaller upper house. [4] [5]

Rationale for bicameralism and criticism

A formidable sinister interest may always obtain the complete command of a dominant assembly by some chance and for a moment, and it is therefore of great use to have a second chamber of an opposite sort, differently composed, in which that interest in all likelihood will not rule.

—  Walter Bagehot, "The English Constitution", in Norman St John-Stevas, ed., The Collected Works of Walter Bagehot, London, The Economist, vol. 5, pp. 273–274.

There have been a number of rationales put forward in favour of bicameralism, federal states have often adopted it, and the solution remains popular when regional differences or sensitivities require more explicit representation, with the second chamber representing the constituent states. Nevertheless, the older justification for second chambers—providing opportunities for second thoughts about legislation—has survived.[ citation needed]

Growing awareness of the complexity of the notion of representation and the multifunctional nature of modern legislatures may be affording incipient new rationales for second chambers, though these do generally remain contested institutions in ways that first chambers are not. An example of political controversy regarding a second chamber has been the debate over the powers of the Senate of Canada or the election of the Senate of France. [6]

The relationship between the two chambers varies; in some cases, they have equal power, while in others, one chamber is clearly superior in its powers. The first tends to be the case in federal systems and those with presidential governments. The latter tends to be the case in unitary states with parliamentary systems.

There are two streams of thought: Critics believe bicameralism makes meaningful political reforms more difficult to achieve and increases the risk of gridlock—particularly in cases where both chambers have similar powers—while proponents argue the merits of the " checks and balances" provided by the bicameral model, which they believe help prevent the passage into law of ill-considered legislation.

Communication between houses

Formal communication between houses is by various methods, including: [7]

Sending messages
Formal notices, such as of resolutions or the passing of bills, usually done in writing, via the clerk and speaker of each house
Transmission
of bills or amendment to bills requiring agreement from the other house
Joint session
a plenary session of both houses at the same time and place.
Joint committees
which may be formed by committees of each house agreeing to join, or by joint resolution of each house
Conferences
Conferences of the Houses of the English (later British) Parliament met in the Painted Chamber of the Palace of Westminster. [8] Historically there were a distinction between an "ordinary conference" and a "free conference"; an ordinary conference in the British Parliament was last held in 1860 as the elaborate procedure was replaced by the simpler sending of messages. A "free conference" meets in private to resolve a dispute; it is organised by managers appointed by each house who report back to it. The last free conference at Westminster was in 1836 on an amendment to the Municipal Corporations Act 1835; [9] the previous one was in 1740. [10] In the Parliament of Australia there have been two formal conferences, in 1930 and 1931, but many informal conferences. [7] [11] As of 2007 the "Conference of Managers" remains the usual procedure for dispute resolution in the Parliament of South Australia. [12] In the Parliament of New South Wales in 2011, the Legislative Assembly requested a free conference with the Legislative Council over a bill on graffiti; after a year the Council refused, describing the mechanism as archaic and inappropriate. [11] The United States Congress has conference committees to resolve discrepancies between House and Senate versions of a bill. The number of conference reports produced by such committees fell from 67 in the 104th Congress (1995–96) to 3 in the 113th Congress (2013–14).

Types

Federal

Some countries, such as Argentina, Australia, Austria, Belgium, Bosnia and Herzegovina, Brazil, Canada, Germany, India, Malaysia, Mexico, Pakistan, Russia, Switzerland, Nigeria, and the United States, link their bicameral systems to their federal political structure.

In the United States, Australia, and Mexico, for example, each state is given the same number of seats in one of the houses of the legislature, despite the total population of each state — it is designed to ensure that smaller states are not overshadowed by larger states, which may have more representation in the other house of the legislature.

Canada

The federal bicameral Parliament of Canada, which contains a House of Commons and a Senate

In Canada, the country as a whole is divided into a number of Senate Divisions, each with a different number of Senators, based on a number of factors. These Divisions are Quebec, Ontario, Western Provinces, and the Maritimes, each with 24 Senators, Yukon, Northwest Territories, Nunavut, each with 1 Senator, and Newfoundland and Labrador has 6 Senators, making for a total of 105 Senators.

Senators in Canada are not elected by the people but are appointed by the Governor General on the advice of the Prime Minister. The Senate does not originate most legislation (although a small fraction of government bills are introduced in the Senate and Senators may introduce private members' bills in the same way as MPs) but acts as a chamber of revision almost always passing legislation approved by the House of Commons, made up of Members of Parliament (MPs) who are elected. The Senate must pass legislation before it becomes law and can therefore act as a wise facilitator or engage in filibuster. The Senate does not have to endure the accountability and scrutiny of parliamentary elections. Therefore, the bicameral structure of Canadian parliament is more de jure than de facto.[ citation needed]

Australia

The federal bicameral Parliament of Australia, which contains a House of Representatives and a Senate

The bicameral Parliament of Australia consists of two Houses, the lower house is called the House of Representatives and the upper house is named the Senate. The lower house currently consists of 150 members, each elected from single member constituencies, known as electoral divisions (commonly referred to as "electorates" or "seats") using full-preference Instant-runoff voting. This tends to lead to the chamber being dominated by two major parties, the Liberal/ National Coalition and the Labor Party. The government of the day must achieve the confidence of this House to gain and hold power.

The upper house, the Senate, is also popularly elected under the single transferable vote system of proportional representation. There are a total of 76 senators: 12 senators are elected from each of the six Australian states (regardless of population) and two from each of the two autonomous internal territories (the Australian Capital Territory and the Northern Territory).

Unlike upper houses in most Westminster parliamentary systems, the Australian Senate is vested with significant power, including the capacity to block legislation initiated by the government in the House of Representatives, making it a distinctive hybrid of British Westminster bicameralism and US-style bicameralism. As a result of proportional representation, the chamber features a multitude of parties vying for power. The governing party or coalition, which must maintain the confidence of the lower house, rarely has a majority in the Senate and usually needs to negotiate with other parties and Independents to get legislation passed. [13]

Others

In the German, Indian, and Pakistani systems, the upper houses (the Bundesrat, the Rajya Sabha, and the Senate respectively) are even more closely linked with the federal system, being appointed or elected directly by the governments or legislatures of each German or Indian state, or Pakistani province. This was also the case in the United States before the Seventeenth Amendment was adopted. Because of this coupling to the executive branch, German legal doctrine does not treat the Bundesrat as the second chamber of a bicameral system formally. Rather, it sees the Bundesrat and the Bundestag as independent constitutional bodies. Only the directly elected Bundestag is considered the parliament. [14] In the German Bundesrat, the various Länder have between three and six votes; thus, while the less populated states have a lower weight, they still have a stronger voting power than would be the case in a system based purely on population, as the most populous Land currently has about 27 times the population of the least populous. The Indian Upper House does not have the states represented equally, but on the basis of their population.

There is also bicameralism in countries that are not federations, but have upper houses with representation on a territorial basis. For example, in South Africa, the National Council of Provinces (and before 1997, the Senate) has its members chosen by each Province's legislature.

In Spain the Senate functions as a de facto territorial-based upper house, and there has been some pressure from the Autonomous Communities to reform it into a strictly territorial chamber.

The European Union maintains a bicameral legislative system consisting of the European Parliament, which is elected in general elections on the basis of universal suffrage, and the Council of the European Union, which consists of members of the governments of the Member States who are competent for a relevant field of legislation. The European Union is not considered a state, but it enjoys the power to legislate in many areas, with exclusive power in some areas.

Aristocratic and post-aristocratic

In a few countries, bicameralism involves the juxtaposition of democratic and aristocratic elements.

The best known example is the British House of Lords, which includes a number of hereditary peers. The House of Lords is a vestige of the aristocratic system that once predominated in British politics, while the other house, the House of Commons, is entirely elected. Over the years, some have proposed reforms to the House of Lords, some of which have been at least partly successful. The House of Lords Act 1999 limited the number of hereditary peers (as opposed to life peers, appointed by the Monarch on the advice of the Prime Minister) to 92, down from around 700. Of these 92, one is the Earl Marshal, a hereditary office always held by the Duke of Norfolk, one is the Lord Great Chamberlain, a hereditary office held by turns, currently by the Marquess of Cholmondeley, and the other 90 are elected by all sitting peers. Hereditary peers elected by the House to sit as representative peers sit for life; when a representative peer dies, byelections occur to fill the vacancy. The ability of the House of Lords to block legislation is curtailed by the Parliament Acts 1911 and 1949. Peers can introduce bills except Money Bills, and all legislation must be passed by both Houses of Parliament. If not passed within two sessions, the House of Commons can override the Lords delay by invoking the Parliament Act. Certain legislation, however, must be approved by both Houses and can't be forced through by the Commons under the Parliament Act. These include any bill that would extend the time length of a Parliament, private bills, bills sent to the House of Lords less than one month before the end of a session, and bills that originated in the House of Lords.

Life Peers are appointed either by recommendation of the Appointment Commission; the independent body that vets non-partisan peers, typically from academia, business or culture, or by Dissolution Honour, which takes place at the end of every Parliamentary term and leaving MPs may be offered a seat to keep their institutional memory. It is traditional to offer a peerage to every outgoing Speaker of the House of Commons. [15]

Further reform of the Lords has been proposed; however, reform is not supported by many. Members of the House of Lords all have an aristocratic title, or are from the Clergy. 26 Archbishops and Bishops of the Church of England sit as Lords Spiritual, being the Archbishop of Canterbury, Archbishop of York, the Bishop of London, the Bishop of Durham, the Bishop of Winchester and the next 21 longest-serving Bishops. It is usual that retiring Archbishops, and certain other Bishops, are appointed to the Crossbenches and given a life peerage. Until 2009, 12 Lords of Appeal in Ordinary sat in the House as the highest court in the land; they subsequently became justices of the newly created Supreme Court of the United Kingdom. At present, 786 people sit in the House of Lords, with 92 Hereditary, 26 being Bishops or Archbishops (the Lords Spiritual) and the rest being Life Peers. Membership is not fixed and decreases only on the death of a life peer.

Another example of aristocratic bicameralism was the Japanese House of Peers, abolished after World War II and replaced with the present House of Councillors.

Unitary states

Some bicameral legislatures have chambers that meet on different buildings, at different parts of the city. Here, France's upper house called the Senate meet in the Luxembourg Palace (top), while the lower house, the National Assembly, meets at the Palais Bourbon (bottom).

Many bicameral countries like the Netherlands, the Philippines, the Czech Republic, the Republic of Ireland and Romania are examples of bicameral systems existing in unitary states. In countries such as these, the upper house generally focuses on scrutinizing and possibly vetoing the decisions of the lower house.

On the other hand, in Italy the Parliament consists of two chambers that have the same role and power: the Senate (Senate of the Republic, commonly considered the upper house) and the Chamber of Deputies (considered the lower house).

In some of these countries, the upper house is indirectly elected. Members of France's Senate and Ireland's Seanad Éireann are chosen by electoral colleges, the latter's consisting of members of the lower house, local councillors, the Taoiseach, and graduates of selected universities, while the Netherlands' Senate is chosen by members of provincial assemblies (which, in turn, are directly elected).

Norway had a kind of semi-bicameral legislature with two chambers, or departments, within the same elected body, the Storting. These were called the Odelsting and were abolished after the general election of 2009. According to Morten Søberg, there was a related system in the 1798 constitution of the Batavian Republic. [16]

In Hong Kong, members of the unicameral Legislative Council returned from the democratically elected geographical constituencies and partially-democratic functional constituencies are required to vote separately since 1997 on motions, bills or amendments to government bills not introduced by the government. The passage of these motions, bills or amendments to government bills requires double majority in both groups simultaneously. (Before 2004, when elections to the Legislative Council from the Election Committee was abolished, members returned through the Election Committee vote with members returned from geographical constituencies.) The double majority requirement does not apply to motions, bills and amendments introduced by the government.

Subnational entities

In some countries with federal systems, individual states (like those of the United States, Australia and a few States of India) may also have bicameral legislatures. A few such states as Nebraska in the U.S., Queensland in Australia, Bavaria in Germany, and Tucumán and Córdoba in Argentina have later adopted unicameral systems. Brazilian states and Canadian provinces had all their upper houses abolished.

Argentina

Provincial legislatures of Argentina.

In Argentina, eight provinces have bicameral legislatures, with a Senate and a Chamber of Deputies: Buenos Aires, Catamarca, Corrientes, Entre Ríos, Mendoza, Salta, San Luis (since 1987) and Santa Fe. Tucumán and Córdoba changed to unicameral systems in 1990 and 2001 respectively. [17]

Australia

In Australian states, the lower house was traditionally elected based on the one-vote-one-value principle, whereas the upper house was partially appointed and elected, with a bias towards country voters and landowners. In Queensland, the appointed upper house was abolished in 1922, while in New South Wales there were similar attempts at abolition, before the upper house was reformed in the 1970s to provide for direct election. Nowadays, the upper house both federally and in most states is elected using the Single transferable vote form of proportional representation while the lower house uses Instant-runoff voting in single member electorates. This is reversed in the state of Tasmania, where proportional representation is used for the lower house and single member electorates for the upper house.

Bosnia and Herzegovina

The Legislature of the Federation of Bosnia and Herzegovina, one of the two entities of Bosnia and Herzegovina, is a bicameral legislative body. It consists of two chambers. The House of Representatives has 98 delegates, elected for four-year terms by proportional representation. The House of Peoples has 58 members, 17 delegates from among each of the constituent peoples of the Federation, and 7 delegates from among the other peoples. [18] Republika Srpska, the other entity, has a unicameral parliament, known as the National Assembly. [19]

Germany

The German federal state of Bavaria had a bicameral legislature from 1946 to 1999, when the Senate was abolished by a referendum amending the state's constitution. The other 15 states have used a unicameral system since their founding.

India

Seven Indian States, Andhra Pradesh, Bihar, Jammu and Kashmir, Karnataka, Maharashtra, Telangana and Uttar Pradesh, have bicameral Legislatures, in these states the upper house is called Vidhan Parishad (Legislative Councils), one third of whom members are elected every two years. Among the members of legislative councils:

From 1956 to 1958 the Andhra Pradesh Legislature was unicameral. In 1958, when the Legislative Council was formed, it became bicameral until 1 June 1985 when it was abolished. This continued until March 2007 when the Legislative Council was reestablished and elections were held for its seats. Since then the Andhra Pradesh Legislature has become once again bicameral. In Tamil Nadu, a resolution was passed on 14 May 1986 and the Legislative Council was dissolved on 1 November 1986. Again on 12 April 2010, a resolution was passed to bring it back bicameral, but became unsuccessful in 2011. Similarly the states of Assam, Madhya Pradesh, Punjab and West Bengal have also dissolved the upper house of their state legislature.

Russia

Under Soviet regime regional and local Soviets were unicameral. After the adoption of 1993 Russian Constitution bicameralism was introduced in some regions. Bicameral regional legislatures are still technically allowed by federal law but this clause is dormant now. The last region to switch from bicameralism to unicameralism was Sverdlovsk Oblast in 2012.

United States

During the 1930s, the Legislature of the State of Nebraska was reduced from bicameral to unicameral with the 43 members that once comprised that state's Senate. One of the arguments used to sell the idea at the time to Nebraska voters was that by adopting a unicameral system, the perceived evils of the " conference committee" process would be eliminated.

A conference committee is appointed when the two chambers cannot agree on the same wording of a proposal, and consists of a small number of legislators from each chamber. This tends to place much power in the hands of only a small number of legislators. Whatever legislation, if any, the conference committee finalizes must then be approved in an unamendable "take-it-or-leave-it" manner by both chambers.

During his term as Governor of the State of Minnesota, Jesse Ventura proposed converting the Minnesotan legislature to a single chamber with proportional representation, as a reform that he felt would solve many legislative difficulties and impinge upon legislative corruption. In his book on political issues, Do I Stand Alone?, Ventura argued that bicameral legislatures for provincial and local areas were excessive and unnecessary, and discussed unicameralism as a reform that could address many legislative and budgetary problems for states.

Reform

Arab political reform

A 2005 report [20] on democratic reform in the Arab world by the U.S. Council on Foreign Relations co-sponsored by former Secretary of State Madeleine Albright urged Arab states to adopt bicameralism, with upper chambers appointed on a 'specialized basis'. The Council claimed that this would protect against the ' Tyranny of the majority', expressing concerns that without a system of checks and balances extremists would use the single chamber parliaments to restrict the rights of minority groups.

In 2002, Bahrain adopted a bicameral system with an elected lower chamber and an appointed upper house. This led to a boycott of parliamentary elections that year by the Al Wefaq party, who said that the government would use the upper house to veto their plans. Many secular critics of bicameralism were won around to its benefits in 2005, after many MPs in the lower house voted for the introduction of so-called morality police.

Romania

A referendum on introducing a unicameral Parliament instead of the current bicameral Parliament was held in Romania on 22 November 2009. The turnout rate was 50.95%, with 77.78% of "Yes" votes for a unicameral Parliament. [21] This referendum had a consultative role, thus requiring a parliamentary initiative and another referendum to ratify the new proposed changes.

Ivory Coast

A referendum on a new constitution was held on 30 October 2016. The constitution draft would create a bicameral Parliament instead of the current unicameral. The Senate is expected to represent the interests of territorial collectivities and Ivoirians living abroad. Two thirds of the Senate is to be elected at the same time as the general election. The remaining one third is appointed by the president elect. [22]

Examples

Current

  Nations with bicameral legislatures.
  Nations with unicameral legislatures.
  Unicameral legislature with advisory body.
  No legislature.
  No data.
Country Bicameral body Notes
Upper house Lower house
  Afghanistan National Assembly
Meshrano Jirga (House of Elders) Wolesi Jirga (House of the People)
  Algeria Parliament
Council of the Nation People's National Assembly
  Antigua and Barbuda Parliament
Senate House of Representatives
  Argentina National Congress Of the twenty-three provincial legislatures, eight are bicameral, while the remaining fifteen and the legislature of the Autonomous City of Buenos Aires are unicameral.
Senate Chamber of Deputies
  Australia Parliament All of the state parliaments except Queensland's are also bicameral. The Northern Territory and the Australian Capital Territory are also unicameral.
Senate House of Representatives
  Austria Parliament All of the Bundesländer have unicameral parliaments.
Bundesrat (Federal Council) Nationalrat (National Council)
  Bahamas Parliament
Senate House of Assembly
  Bahrain National Assembly
Consultative Council Council of Representatives
  Barbados Parliament
Senate House of Assembly
  Belarus National Assembly
Council House of Representatives
  Belgium Federal Parliament All of the community and regional parliaments are unicameral.
Senate Chamber of Representatives
  Belize National Assembly
Senate House of Representatives
  Bhutan Parliament
National Council National Assembly
  Bolivia Plurinational Legislative Assembly
Senate Chamber of Deputies
  Brazil National Congress All of the 26 state legislatures and the Federal District legislature are unicameral.
Senate Chamber of Deputies
  Burundi Parliament
Senate National Assembly
  Cambodia Parliament
Senate National Assembly
  Canada Parliament All of the provincial legislatures are unicameral.
Senate House of Commons
  Cameroon Parliament
Senate National Assembly
  Central African Republic Parliament
Senate National Assembly
  Chile National Congress
Senate Chamber of Deputies
  Colombia Congress
Senate Chamber of Representatives
  Czech Republic Parliament
Senate Chamber of Deputies
  DR Congo Parliament
Senate National Assembly
  Congo Parliament
Senate National Assembly
  Equatorial Guinea Parliament
Senate National Assembly
  Ethiopia Federal Parliamentary Assembly Regional Councils are unicameral. Assemblypersons of the Regional Councils are elected directly.
House of Federation House of Peoples' Representatives
  France Parliament in the Fifth French Republic
Senate National Assembly
  Gabon Parliament
Senate National Assembly
  Germany N/A In Germany, the chambers form two distinct constitutional bodies not framed by a comprehensive institution. All of the federal states ( Länder) today have unicameral parliaments.
Bundesrat (Federal Council) Bundestag (Federal Diet)
  Grenada Parliament
Senate House of Representatives
  Haiti Parliament
Senate Chamber of Deputies
  India Parliament Seven of the twenty-nine states also have bicameral legislatures, consisting the upper house Vidhan Parishad (Legislative Council) and lower house Vidhan Sabha (Legislative Assembly) respectively. The remaining twenty-two states and the union territories of Delhi and Puducherry have unicameral legislature.
Rajya Sabha (Council of States) Lok Sabha (House of the People)
  Indonesia People's Consultative Assembly All of the provinces have unicameral parliaments.
Regional Representative Council People's Representative Council
  Ireland Oireachtas A 2013 proposal to abolish the Seanad was defeated at referendum
Seanad Éireann (Senate of Ireland) Dáil Éireann (Assembly of Ireland)
  Italy Parliament
Senate of the Republic Chamber of Deputies
  Ivory Coast Parliament
Senate National Assembly
  Jamaica Parliament
Senate House of Representatives
  Japan National Diet
House of Councillors House of Representatives
  Jordan Parliament
Senate House of Representatives
  Kazakhstan Parliament
Senate Majilis (Assembly of People)
  Kenya Parliament
Senate National Assembly
  Lesotho Parliament
Senate National Assembly
  Liberia Legislature
Senate House of Representatives
  Madagascar Parliament
Senate National Assembly
  Malaysia Parliament All the 13 State Legislative Assemblies are unicameral.
Dewan Negara (Senate) Dewan Rakyat (House of Representatives)
  Mexico Congress All the 31 State Congresses and the Legislative Assembly of the Federal District are unicameral.
Senate Chamber of Deputies
  Myanmar Pyidaungsu Hluttaw (Assembly of the Union) All the 14 State and Region Hluttaw (Assemblies) are unicameral.
Amyotha Hluttaw (House of Nationalities) Pyithu Hluttaw (House of Representatives)
    Nepal Parliament All of the provincial assemblies are unicameral. [23]
Rastriya Sabha (National Assembly) Pratinidhi Sabha (House of Representatives)
  Netherlands States General
Eerste Kamer Tweede Kamer
  Nigeria National Assembly
Senate House of Representatives
  Oman Parliament
Majlis al-Dawla (Council of State) Majlis al-Shura (Consultative Assembly)
  Pakistan Parliament All of the provincial assemblies are unicameral.
Senate National Assembly
  Palau National Congress
Senate House of Delegates
  Philippines Congress All local legislatures are unicameral.
Senate House of Representatives
  Poland National Assembly
Senate Sejm ( Diet)
  Romania Parliament
Senate Chamber of Deputies
  Russian Federation Federal Assembly All the regional legislatures are now unicameral while bicameralism in regions is technically allowed by the Federation.
Federation Council State Duma
  Saint Lucia Parliament
Senate House of Assembly
  South Africa Parliament All of the provincial legislatures are unicameral.
National Council of Provinces National Assembly
  Spain Cortes Generales Moreover, each Spanish autonomous region has its own unicameral regional parliament, with wide-ranging legislative powers on their own.
Senate Congress of Deputies
   Switzerland Federal Assembly All of the cantons have unicameral parliaments.
Council of States National Council
  Trinidad and Tobago Parliament
Senate House of Representatives
  United Kingdom Parliament Scotland, Wales and Northern Ireland have devolved unicameral legislatures with limited devolved powers.
House of Lords House of Commons
  United States Congress All of the state legislatures, except Nebraska, are also bicameral. The Legislative Assembly of Puerto Rico is bicameral. The Council of the District of Columbia is unicameral.
Senate House of Representatives
  Uruguay General Assembly
Senate Chamber of Representatives
  Uzbekistan Supreme Assembly
Senate Legislative Chamber
  Zimbabwe Parliament
Senate House of Assembly

Historical

  Denmark Rigsdagen Under the constitution Rigsdagen was created, with two houses, an upper and lower house. However, after the 1953 referendum, both Rigsdagen and the Landsting was abolished, making the Folketing the sole chamber of the parliament.
Landsting ( Upper house) Folketing ( Lower house)
  Greece Parliament of the Hellenes The Senate as an upper chamber was established by the Greek Constitution of 1844, of the Kingdom of Greece, and was abolished by the Greek Constitution of 1864. The Senate was reestabished by the republican Constitution of 1927, which establishing the Second Hellenic Republic and was disestablished by the restoration of the Kingdom of Greece at 1935.
Gerousia ( Senate) Vouli ( Chamber of Deputies)
  Korea, South National Assembly Under the first constitution ( first republic, 1948–52), the National Assembly was unicameral. The second and third constitutions (first republic, 1952–60) regulated the National Assembly was bicameral and consisted of the House of Commons and the Senate, but only the House of Commons was established and the House of Commons could not pass a bill to establish the Senate. During the short-lived second republic (1960–61), the National Assembly became practically bicameral, but it was overturned by the May 16 coup. The National Assembly has been unicameral since its reopen in 1963.
Senate House of Commons
  New Zealand Parliament Until 1950, the New Zealand Parliament was bicameral. It became unicameral in 1951, but the name "House of Representatives" has been retained.
Legislative Council House of Representatives
  Peru Congress The 1979 Constitution, which marked the return to democracy, followed the trend of previous constitutions of keeping a bicameral legislature. However it was dissolved altogether by President Alberto Fujimori by his 1992 autocoup. Later, under the newer 1993 constitution, the bicameral system was replaced by the unicameral Congress of the Republic.
Senate Chamber of Deputies
  Portugal Cortes During the period of Constitutional Monarchy, the Portuguese Parliament was bicameral. The lower house was the Chamber of Deputies and the upper house was the Chamber of Peers (except during the 1838-1842 period, where a Senate existed instead). With the replacement of the Monarchy by the Republic in 1910, the Parliament continued to be bicameral with a Chamber of Deputies and a Senate existing until 1926.
Chamber of Deputies Chamber of Peers
  Sweden Riksdagen Until 1970, the Swedish Riksdag was bicameral. It became unicameral in 1971, but retained the name Riksdag.
Första kammaren ( Upper house) Andra kammaren ( Lower house)
  Turkey Parliament It was established with the Turkish constitution of 1961 and abolished with the Turkish constitution of 1982, although it did not exist between 1980 and 1982 either as a result of the 1980 coup d'état in Turkey.
National Assembly Senate of the Republic
  Venezuela Congress Under the 1999 constitution, the bicameral system was replaced by the unicameral National Assembly of Venezuela.
Chamber of Deputies Senate
  Mauritania Parliament Under the 2017 Referendum, the bicameral system was replaced by the unicameral system.
Senate National Assembly

References

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  6. ^ (in French) Liberation.fr, Sénat, le triomphe de l'anomalie
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