
In the United States, the Supreme Court has the ultimate authority to decide whether a law is unconstitutional. This power is known as judicial review, which allows courts to determine the constitutionality of the actions of the other two branches of government. While the U.S. Constitution does not explicitly define the power of judicial review, it has been inferred from its structure, provisions, and history. The Supreme Court's first exercise of this power was in Marbury v. Madison (1803), where it asserted its authority to strike down a law as unconstitutional. Since then, the Court has held numerous laws as unconstitutional, either in whole or in part, based on violations of human rights, failure to observe the Constitution, or exceeding the powers of the law-making body.
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What You'll Learn

Judicial review
In the United States, the Supreme Court has the power to decide whether a law is unconstitutional. This power is known as judicial review, which allows the courts to evaluate the constitutionality of legislative and executive actions. The Supreme Court's authority to determine the constitutionality of laws stems from the Marbury v. Madison case in 1803, where the Court, led by Chief Justice John Marshall, asserted its power to invalidate laws conflicting with the Constitution.
The concept of judicial review was first recognised in American law in Bayard v. Singleton (1787), decided by the Supreme Court of North Carolina's predecessor. In this case, the court treated the state constitution as the fundamental law, interpreting and applying it over inconsistent legislative acts. Notable early state cases involving judicial review include Commonwealth v. Caton (Virginia, 1782), Rutgers v. Waddington (New York, 1784), and Trevett v. Weeden (Rhode Island, 1786).
While the US Constitution does not explicitly define judicial review, its authority has been inferred from its structure, provisions, and history. The first case decided by the US Supreme Court involving a direct challenge to the constitutionality of an act of Congress was Hylton v. United States (1796), which involved a "carriage tax". However, the Court found the Carriage Act constitutional.
Since Marbury v. Madison, the Supreme Court has held 176 Acts of Congress unconstitutional as of 2014, with 483 laws held wholly or partially unconstitutional between 1960 and 2019. An example of judicial review in practice is Brown v. Board of Education (1954), where the Supreme Court declared state laws establishing racial segregation in public schools unconstitutional.
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State vs federal power
In the United States, the power to decide whether a law is unconstitutional rests with the Supreme Court. This power stems from the concept of judicial review, which was established in the Marbury v. Madison case in 1803. The Supreme Court's authority in this regard ensures that laws comply with the Constitution and maintains a balance of power across different branches of the government.
The United States operates under a system of federalism, which divides power between national and regional governments. This system allows states a degree of autonomy to test ideas and act as "laboratories of democracy". The Tenth Amendment to the U.S. Constitution, ratified in 1791, is pivotal in delineating federal and state powers. It states that any powers not explicitly delegated to the federal government by the Constitution are reserved for the states or the people.
While the federal government possesses enumerated or expressed powers explicitly listed in the Constitution, it also holds implicit powers necessary to execute other powers. For instance, the federal government can incentivize states to align with its interests through grants and mandates. However, the division of powers between state and federal governments is not always clear-cut, and conflicts over power have persisted throughout U.S. history.
States and their courts play a significant role in shaping and checking federal power. They influence the implementation of federal policies and curb potential abuses of power. State laws and constitutions can counter federal policies and shape institutional behaviour. For example, during the Trump administration, several states challenged federal policies targeting immigrants, transgender people, and diversity initiatives through legal action. States also possess the power to determine the extent of cooperation between state and federal officials, as seen in conflicting state approaches to immigration enforcement.
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National laws and human rights
In the United States, the Supreme Court has the authority to decide whether a law is unconstitutional. This power, known as judicial review, allows the courts to evaluate the constitutionality of legislative and executive actions. The concept of judicial review was established in the Marbury v. Madison case in 1803, where the Court asserted its authority to invalidate laws conflicting with the Constitution. This set a precedent for the judicial branch's role in checking the powers of Congress and the President. Judicial review ensures that laws comply with the Constitution and protects individual rights.
Internationally, the United Nations has played a significant role in promoting human rights through the Universal Declaration of Human Rights (UDHR), which outlines basic civil, political, economic, social, and cultural rights that all individuals should enjoy. The UDHR, along with other international treaties and instruments, has conferred legal form on inherent human rights and developed international human rights norms.
National constitutions are crucial in anchoring human rights within a country's legal framework. Constitutions from around the world can be accessed through various resources, such as the Constituent project by the University of Texas, which provides the full text of almost every national constitution in force, often with English translations. Other resources include the Foreign Law Guide, which organizes content by country and subject, and the International Encyclopaedia of Laws, featuring jurisdiction-specific constitutional law treatises.
In summary, national laws and human rights are intertwined, with the rule of law serving as the implementation mechanism for human rights. The interpretation and evaluation of national laws in relation to human rights fall under the authority of the respective country's judicial system, such as the Supreme Court in the United States.
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County laws and public participation
In the United States, the Supreme Court has the authority to decide whether a law is unconstitutional. This power is part of the concept of judicial review, which allows the courts to interpret the constitutionality of laws. The Supreme Court's power to do so was established in the Marbury v. Madison case in 1803.
Public participation is a constitutional requirement, as stipulated in Article 1 of the Constitution, which states that sovereign power belongs to the people. In the context of county laws, public participation is essential for ensuring that the county government represents the interests of its citizens.
The County Executive Committee, all departments, and all levels of administration, including the sub-county, ward, and village administration, are responsible for undertaking public participation. The County Assembly also plays a crucial role in consulting with citizens, presenting their views, and advocating for their interests.
The county government should adopt various forms of public participation, such as informing the public about issues, options, and solutions; consulting with citizens to obtain their feedback; and involving them in the decision-making process to ensure their concerns are addressed. This process of public participation is structured to give a voice to the voiceless and empower citizens to have a say in the decisions that affect them.
To facilitate effective public participation, it is essential to provide timely and relevant information accessible to all members of the public. This includes utilizing participatory meeting formats and online tools to encourage citizens' involvement and ensure their perspectives are considered.
By promoting transparency and accountability through public participation, county governments can enhance the legitimacy of their decisions and build mutual trust with their citizens.
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Supreme Court authority
In the United States, the Supreme Court has the authority to decide whether a law is unconstitutional. This power stems from the concept of judicial review, which allows courts to interpret and evaluate the constitutionality of legislative and executive actions. The Supreme Court's authority to strike down laws that violate the Constitution was established in the landmark case of Marbury v. Madison in 1803, led by Chief Justice John Marshall. This set a precedent for the judicial branch's role in checking the powers of Congress and the President, ensuring that laws comply with the Constitution and protecting individual rights.
The Supreme Court's power of judicial review acts as a safeguard against potential abuses of power by the legislative and executive branches. It ensures that laws passed by Congress and signed by the President do not contravene the Constitution. The Court has final appellate jurisdiction in all cases arising under the Constitution, giving it the ultimate authority to interpret and enforce constitutional provisions. This authority has been inferred from the structure, provisions, and history of the Constitution, even though it is not explicitly defined in the document itself.
The Supreme Court has used its power of judicial review on numerous occasions to strike down laws that were found to be unconstitutional. For example, in 1954, the Court ruled in Brown v. Board of Education that state laws establishing racial segregation in public schools were unconstitutional. In another case, Crandall v. Nevada (1868), the Court held that a Nevada tax on individuals leaving the state violated the privileges of US citizens to move freely across state lines.
The Supreme Court's authority to decide on the constitutionality of laws is a crucial aspect of the American system of checks and balances. It prevents the legislative and executive branches from exceeding their powers and ensures that the rights of citizens are protected. The Court's decisions in this regard have shaped the legal landscape in the United States and continue to guide the interpretation and application of the Constitution.
While the Supreme Court has the final say on constitutional matters, it is important to note that other bodies, such as federal courts and state courts, also play a role in the judicial review process. State courts, in particular, have historically recognised the principle of judicial review, treating state constitutions as the fundamental law to be interpreted and applied by judges. The Supreme Court's authority, however, supersedes that of lower courts, and it has the ultimate power to determine whether a law is unconstitutional.
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Frequently asked questions
The Supreme Court has the ultimate authority to decide whether statutes are consistent with the Constitution.
Judicial review.
The Supreme Court has the power to invalidate federal and state laws that are contrary to the Constitution.
Marbury v. Madison in 1803.
The Supreme Court has the responsibility to overturn unconstitutional legislation and uphold the Constitution.

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