
Supermajority rules are a requirement for a proposal to gain a specified level of support greater than the threshold of a simple majority vote. They are often used to prevent the majority from eroding the fundamental rights of a minority. Supermajority votes are required for several major legislative actions in the US Congress, including impeaching the president, invoking the 25th Amendment, and amending the Constitution. In most states, a supermajority vote of the state legislature is necessary to send a measure to amend the US Constitution to the voters for ratification. This essay will explore the concept of supermajorities, their role in the US political system, and the implications for democracy and governance.
| Characteristics | Values |
|---|---|
| Definition | A supermajority is a requirement for a proposal to gain a specified level of support which is greater than the threshold of one-half used for a simple majority. |
| Purpose | Supermajority rules in a democracy can help to prevent a majority from eroding the fundamental rights of a minority, but they can also hamper efforts to respond to problems and encourage corrupt compromises. |
| Examples in the US Constitution | The US Senate requires a supermajority of 60% to move to a vote through a cloture motion, ending a filibuster by a minority of members. In almost all states, a supermajority vote of the state legislature is necessary to send a measure to amend the US Constitution to the voters for ratification. |
| Other Examples | The UN Security Council requires a supermajority of at least nine of its 15 members (three-fifths) to pass substantive matters. In Italy, between 1948 and 1993, senators (except for the South Tyrolean People's Party) required a two-thirds majority to get elected. |
| Types | There are two types of two-thirds majority: simple and absolute. A simple majority is when the number of votes for a proposition must exceed the votes against it, while an absolute majority requires two-thirds of the entire membership of a body to agree. |
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What You'll Learn

Impeaching the president
Impeachment is the process of bringing charges against a government official for wrongdoing. The Constitution gives Congress the power to impeach federal officials, including the president, vice president, and all civil officers of the United States. The House of Representatives has the sole power of impeachment and can initiate the process by presenting a list of charges or referring them to the appropriate committee. The House investigates through an impeachment inquiry and then must pass articles of impeachment by a simple majority vote. At this point, the official has been impeached.
The Senate then tries the accused, sitting as a High Court of Impeachment to consider evidence, hear witnesses, and vote to acquit or convict. In the case of presidential impeachment, the chief justice of the United States presides over the proceedings. The Senate must vote to convict by a two-thirds supermajority, and the penalty for an impeached official is removal from office. In some cases, the Senate may also disqualify officials from holding public office in the future.
Impeachment proceedings are remedial rather than punitive, and a party may still be subject to criminal or civil trial, prosecution, and conviction under the law after removal from office. The president cannot grant a pardon in the case of impeachment.
The Founding Fathers generally favored simple majority votes in legislative decision-making, but they also recognized the need for supermajority votes in certain cases. Supermajority rules can help prevent a majority from eroding the fundamental rights of a minority and protect against "tyranny of the majority." In the United States Congress, several major legislative actions require a supermajority vote, including impeaching the president, declaring a president incapable of serving under the 25th Amendment, and amending the Constitution.
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Amending the Constitution
Amending the US Constitution
The US Constitution is a foundational document that outlines the country's fundamental laws and principles. It is a challenging process to amend the Constitution, and it requires a high level of agreement, often in the form of a supermajority vote. This is because constitutions should not be amended without careful deliberation, and supermajority votes are intended to prevent a "tyranny of the majority," encouraging compromise and deliberation.
In the US, several legislative actions require a supermajority vote, including impeaching the president, declaring a president incapable of serving under the 25th Amendment, and amending the Constitution. While most measures require only a simple majority for passage, some critical actions demand a higher threshold.
The US Congress, comprising the Senate and the House of Representatives, has the authority to require supermajority votes for specific measures. These special rules are often applied to legislation concerning the federal budget or taxation. The Constitution grants each chamber the power to determine its procedural rules, as stated in Article 1, Section 5: "Each chamber may determine the Rules of Its Proceedings."
The Founding Fathers generally favoured simple majority votes in legislative decision-making. However, they also recognised the need for supermajority votes in certain exceptional cases. For instance, in most states, a supermajority vote of the state legislature is necessary to propose an amendment to the US Constitution. This proposal is then sent to the voters for ratification, and all states except Delaware require a popular vote to pass a constitutional amendment.
The specific type of supermajority required can vary. A common threshold is a two-thirds majority, which means the number of votes for a proposition must exceed twice the number of votes against it. There is also an absolute two-thirds majority, which demands the agreement of two-thirds of the entire membership of a body, making it much stronger than a simple requirement. Another type of supermajority is a three-fifths majority (60%).
Supermajority rules have their advantages and disadvantages. On the one hand, they can prevent a majority from eroding the fundamental rights of a minority and protect basic liberties. On the other hand, they may hinder efforts to address issues promptly and encourage corrupt compromises.
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Federal budget and taxation
A supermajority is a requirement for a proposal to gain a specified level of support greater than the threshold of one-half used for a simple majority. Supermajority rules in a democracy can help prevent a majority from eroding the fundamental rights of a minority.
In the United States, supermajority rules are often applied to legislation dealing with the federal budget or taxation. For instance, the Balanced Budget Amendment, a proposed amendment to the US Constitution, would require the federal government to balance its budget each year and needs a supermajority to pass. The amendment has been criticised for its potential impact on social programs and government spending. The tax limitation proposals, on the other hand, require a two-thirds majority to raise taxes.
Many states also require a supermajority vote of the legislature to pass legislation dealing with taxation. A report by the progressive Center on Budget and Policy Priorities criticises supermajority requirements for tax increases as they empower a minority of legislators, making it difficult to close tax loopholes or fund transportation infrastructure. However, according to a 1996 Heritage report, states that require supermajority votes to raise taxes have experienced faster economic growth and fewer tax increases than other states.
In addition, supermajority rules are often required for state or US constitutional amendments because of the belief that constitutions should not be amended without careful deliberation.
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Protecting minority rights
The concept of a supermajority is deeply rooted in the idea of protecting minority rights and preventing "tyranny by the majority". The US Constitution's complex system of checks and balances relies on supermajority rules to prevent the majority from eroding the fundamental rights of minorities.
In the US Congress, several major legislative actions require a supermajority vote, including impeaching the president, invoking the 25th Amendment, and amending the Constitution. This is because the Founding Fathers recognized the need for supermajorities in certain cases, despite generally favoring simple majority votes for legislative decision-making.
At the state level, almost all states require a supermajority vote of the state legislature to send a measure to amend the US Constitution to voters for ratification. This is done to ensure careful deliberation before amending the Constitution, as it is a foundational document. Additionally, many states require a supermajority vote to pass legislation dealing with taxation.
The requirement for a supermajority can vary, with common thresholds being three-fifths (60%), two-thirds (67%), and three-quarters (75%). The type of supermajority can also vary, with a distinction between a simple and absolute two-thirds majority, for example. A simple two-thirds majority is based on the number of votes, while an absolute two-thirds majority is based on the entire membership of a body.
The use of supermajority rules helps to prevent hasty or impulsive decisions that could infringe on minority rights. However, it is important to note that supermajority rules can also hamper efforts to respond to problems and may encourage corrupt compromises.
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Ratification by voters
In most states, a simple majority vote is sufficient for passing ballot initiatives or legislative measures. However, when it comes to amending state constitutions, the process becomes more complex. Of the 49 states that require voter approval for constitutional amendments, 11 states, including Illinois, Florida, and New Hampshire, mandate a supermajority vote for ratification. This means that a fraction greater than one-half, typically two-thirds or three-fifths (60%), of voters must approve the amendment.
The rationale behind requiring a supermajority for ratification is to prevent a "'tyranny of the majority'" and to encourage thoughtful deliberation and compromise during the legislative process. This safeguard ensures that constitutions, which serve as the foundation of governance, are not hastily altered without broad consensus.
The specific requirements for ratification by voters can vary across states. For instance, in Illinois, a constitutional amendment must attain a supermajority vote of 60% of those specifically voting on the amendment or a majority of those who cast ballots in any election. In contrast, Nevada imposes a unique condition: citizen-initiated amendments must be approved by a majority of voters in two consecutive elections.
While supermajority requirements for ratification by voters are prevalent in state-level constitutional amendments, they are notably absent in some critical federal processes. For example, voter ballot initiatives proposing constitutional amendments at the federal level are generally not subject to supermajority requirements, unlike those proposed by state legislatures. This discrepancy has sparked debates among legal experts, who argue for consistent standards to prevent the passage of initiatives with only narrow support.
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Frequently asked questions
A supermajority is a requirement for a proposal to gain a specified level of support that is greater than the threshold of one-half used for a simple majority.
The US Constitution draws authority for requiring supermajority votes from Article 1, Section 5, which states, "Each chamber may determine the Rules of Its Proceedings."
Supermajority votes are often required for state or US constitutional amendments, impeaching a president, or legislation dealing with federal budgets or taxation.
There are two types of supermajorities: simple and absolute. A simple two-thirds majority means that the number of votes for a proposition or candidate must equal or be more than twice the number of votes against it. An absolute two-thirds majority means that two-thirds of the entire membership of a body must agree to the proposition.

























