
A law can be overturned through various mechanisms, depending on the legal system and context. In common law jurisdictions, such as the United States, the principle of stare decisis or precedent guides decision-making, where previous court rulings are followed unless overturned by a higher court. Higher courts, including supreme courts, can overturn lower court rulings if they find legal errors, constitutional violations, or changing social contexts that warrant a different interpretation of the law. Additionally, in the US, laws can be proposed, amended, or overturned through the legislative process, where bills are introduced, debated, and voted on by Congress, and then signed or vetoed by the President.
| Characteristics | Values |
|---|---|
| A bill is proposed by a sitting member of the U.S. Senate or House of Representatives | A bill is a proposal for a new law or a change to an existing law |
| The bill is assigned to a committee | The committee researches, discusses, and makes changes to the bill |
| The bill is put before the chamber to be voted on | If the bill passes one body of Congress, it goes to the other body to go through a similar process of research, discussion, changes, and voting |
| The bill is considered by the president | The president can approve the bill and sign it into law, or veto it |
| Congress votes to override the veto | If Congress votes to override the veto, the bill becomes a law |
| Supreme Court decision | The U.S. Supreme Court is the highest authority and can overturn precedent |
| Referendum | Opponents of a law can initiate a referendum to overturn it |
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What You'll Learn

A bill can be vetoed by the president
In the United States, the president can use their veto power to prevent a bill passed by Congress from becoming law. This is known as a "regular" veto, where the president returns a bill to Congress (to the House in which it originated). The veto power is defined in Article 1, Section 7 of the US Constitution.
The president can approve a bill and sign it into law, or they can refuse to approve it and issue a veto. If the president chooses to veto a bill, Congress can attempt to override the veto by a two-thirds vote of both chambers. If Congress successfully overrides the veto, the bill becomes law without the president's signature.
The president is constitutionally required to state any objections to the bill in writing, and Congress is required to consider them. The veto statement, however, does not carry much direct weight in the American legal system. If Congress fails to override the veto, both the bill and the veto become legally irrelevant.
If the president does not sign or veto a bill within 10 days (excluding Sundays), it automatically becomes law, unless Congress has adjourned before the 10 days are up. In this case, the president can use a pocket veto, where the bill does not become law without their signature. Pocket vetoes cannot be overridden by Congress.
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Congress can override a presidential veto
In the United States, laws are made by Congress, which includes the House of Representatives and the Senate. Members of Congress propose and debate bills, which are proposals for new laws or changes to existing ones. Once a bill is approved by a majority in both houses of Congress, it is sent to the President. The President can either sign the bill into law or veto it, sending it back to Congress with their objections. However, Congress has the power to override a presidential veto with a two-thirds majority vote in both the House of Representatives and the Senate. This process is known as a veto override, and it allows Congress to pass a bill into law even without the President's approval.
The legislative process is a crucial aspect of how laws and policies are created in the United States. It involves multiple steps, starting with an idea for a new law, which is then written into a bill. Once a bill is introduced, it is assigned to a committee whose members will research, discuss, and make changes to the bill. The bill is then put before that chamber to be voted on. If the bill passes one body of Congress, it goes through a similar process in the other body, including research, discussion, changes, and voting. Once both bodies vote to accept a bill, they must work out any differences between the two versions.
The President's veto power is an important check on the legislative branch, allowing the President to review acts passed by Congress and block measures that are found to be unconstitutional, unjust, or unwise. However, the power to override a presidential veto showcases Congress's supreme role in the legislative process and serves as a reminder that while the President has significant power, Congress ultimately holds the legislative authority to enact laws that reflect the will of the people.
While Congress has the authority to override a presidential veto, it is important to note that this power is not frequently exercised. Achieving a two-thirds majority vote in both chambers is a difficult task and demonstrates strong support for the vetoed bill. Nonetheless, the ability to override a veto is an essential aspect of the system of checks and balances in the U.S. government, ensuring that no single branch becomes too powerful and that the legislative power remains balanced between the President and Congress.
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Supreme Courts can overturn precedent
However, the Supreme Court can and has overturned its own precedent in certain cases. For example, in Citizens United v. FEC, the Court overturned its previous decision in Austin v. Michigan State Chamber of Commerce, which had held that the government could prohibit political speech funded from a corporation's general treasury fund. The Supreme Court's decision in Citizens United established that the First Amendment prohibits governments from restricting independent expenditures on political speech related to election campaigns by corporations and other organizations.
In another case, Janus v. American Federation of State, County, and Municipal Employees, the Court overturned its 1977 holding in Abood v. Detroit Board of Education, determining that laws requiring non-union public employees to pay "fair share" fees to the union violated the First Amendment.
Justices may argue for overturning precedent on the basis that a previous doctrine was unworkable in the context of a new case, that significant social changes have occurred since the precedent was established, or that the precedent violated an earlier precedent. For example, in Dobbs v. Jackson Women's Health Organization, the Supreme Court overturned Roe v. Wade and Planned Parenthood of Southeastern Pennsylvania v. Casey, rejecting the legal precedent set by these cases on abortion rights.
While some critics argue that strict adherence to stare decisis is necessary to promote stability and evenhandedness in the legal system, others contend that overruling incorrect precedents may be necessary to rectify egregiously wrong or unworkable decisions or to account for changes in societal understandings of legal issues.
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A referendum can overturn a law
In the United States, a referendum can lead to a law being overturned. A referendum is a form of direct democracy that allows citizens to vote directly on a proposal, rather than through their elected representatives.
There are two main types of referendums that can impact laws: legislative referendums and veto referendums. Legislative referendums, also known as legislative referrals or referendum bills, occur when the legislature puts proposed legislation up for a popular vote. This can be done voluntarily or, in the case of a constitutional amendment, as an obligatory part of the procedure. With the exception of Delaware, 49 US states allow legislatively referred state constitutional amendments.
Veto referendums, also known as citizen vetoes or people's vetoes, allow citizens to challenge an existing law by gathering a predetermined number of signatures to qualify a ballot measure for voting on repealing or not a specific state law. The number of signatures required to put a law before voters can vary, with some states requiring a higher number than others. For example, in Mississippi, the requirement was reported to be 49,660 valid signatures in 2021, while in another instance, the number was reported to be 232,072 signatures.
In addition to legislative and veto referendums, there are also citizen-initiated amendments or constitutional amendments. These allow citizens to propose and vote on constitutional amendments directly, without the need for legislative referral. When a sufficient number of citizens have signed a petition requesting an amendment, it is then put to a vote. If the amendment passes, it may still be overturned if it is challenged in court and confirmed to be unconstitutional.
While the referendum process can lead to laws being overturned or prevented from taking effect, it is important to note that the specific procedures and requirements can vary by state and jurisdiction. The referendum process is just one way to create or change laws, and it interacts with the traditional lawmaking process, which involves members of Congress proposing and voting on bills, and the president approving or vetoing them.
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A higher court can overturn a lower court's ruling
A court decision or precedent can be overturned when a judiciary rejects the result of a prior court proceeding. In the United States, the U.S. Supreme Court is the highest authority with regard to precedent and decision-making within its jurisdiction. State supreme courts also set precedents and resolve conflicting interpretations of state laws. When a court rules against a party to a lawsuit, that party may choose to appeal the decision. The appeals process typically involves filing a notice of appeal with a lower court, indicating the party's intention to take the matter to the next highest court with jurisdiction over the matter. The appealing party files a petition for a writ of certiorari, a formal request for the higher court to review the lower court's decision.
U.S. courts follow the principle of precedent or stare decisis, meaning that previous court decisions guide decision-making in new cases. Supreme courts can overturn precedent. Justices making such decisions often argue that a previous doctrine was unworkable in the context of a case being decided, that significant social changes have occurred since a precedent was established, or that the most recent precedent violated an earlier precedent (in which case the court might describe its decision as reaffirming the older interpretation of the law).
Appellate courts generally review whether law and precedent were properly interpreted and applied in cases. If a higher court finds that a lower court did not properly apply or interpret a law or constitutional provision, it may overturn the lower court's decision. The doctrine of binding precedent requires the lower court to anticipate whether the appellate court will rule differently. From the perspective of the lower court judge, the conclusion is a truism: The judge predicts and thereby minimizes the chances of reversal.
The lower court should predict what the higher court would do if the case were to be appealed. If we think of the court of appeals as one court with an internal process that involves both panel decisions and the possibility of en banc review, then the lower court should simply try to predict how the entire process will result. On the other hand, if we think of the en banc court as a court one level higher than the court of appeals panel and one level lower than the Supreme Court, then the potential difference between panel and en banc decisions presents the district court with a quandary.
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Frequently asked questions
To overturn a law means to change a legal decision.
A law can be overturned by a higher court, such as the U.S. Supreme Court, which is the highest authority in the U.S. with the power to overturn precedent.
The U.S. Supreme Court can overturn a precedent by arguing that a previous doctrine was unworkable in the context of a new case, that significant social changes have occurred since the precedent was established, or that the precedent violated an earlier precedent.
Yes, a proposed law can be overturned before it is passed if it is vetoed by the President and Congress does not vote to override that veto.
Yes, a law can be overturned after it is passed through a referendum, a new act, or a new court ruling.










































