
The U.S. Constitution is the nation's fundamental law, and any law passed by Congress that conflicts with it is deemed inferior. The Supremacy Clause, or Article VI, Clause 2, establishes that the Constitution, federal laws, and treaties made under the Constitution's authority are the supreme Law of the Land, taking precedence over conflicting state laws. This principle, known as federal preemption, applies to conflicting laws from legislatures, courts, administrative agencies, or constitutions. Federal statutes and treaties must also adhere to the Constitution's limits on federal power, such as the Bill of Rights. The Supreme Court plays a pivotal role in interpreting the Constitution and determining the constitutionality of laws passed by Congress and state legislatures.
| Characteristics | Values |
|---|---|
| Court's responsibility | Interpreting the Constitution's meaning and the meaning of laws passed by Congress |
| Supremacy Clause | Federal law prevails over conflicting state law |
| Supremacy Clause | Treaties and federal statutes are regarded as "supreme law of the land" |
| Supremacy Clause | Federal statutes and treaties must be within the parameters of the Constitution |
| Supremacy Clause | Federal preemption applies regardless of whether the conflicting laws come from legislatures, courts, administrative agencies, or constitutions |
| Supremacy Clause | Congress may implicitly assume preemption over state laws |
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Federal law prevails over conflicting state law
The U.S. Constitution is the nation's fundamental law, and courts are responsible for interpreting its meaning and the meaning of any laws passed by Congress. The Federalist Papers, a collection of 85 essays by Alexander Hamilton, James Madison, and John Jay, were written between 1787 and 1788 to encourage the states to ratify the Constitution. The Federalist #78 states that if any law passed by Congress conflicts with the Constitution, the Constitution and "the intention of the people" should prevail over "the intention of their agents."
The Supremacy Clause, which establishes that the Constitution, federal laws, and treaties are the supreme law of the land, is a key aspect of this. The Supremacy Clause was a response to the lack of a similar provision in the Articles of Confederation, which allowed federal statutes to be non-binding on state courts without implementing state legislation. The Supreme Court applied the principle that federal law prevailed over conflicting state law throughout the latter half of the 19th century, with some limitations due to the Court's embrace of dual federalism, which separated federal and state authority.
In the context of conflicting laws, there are several scenarios to consider. Firstly, conflict preemption occurs when compliance with both federal and state law is impossible or when state law hinders federal objectives. Secondly, a conflict arises if a state law "alters, impairs, or detracts" from the operation of federal law, such as by directly clashing with it, applying to a matter comprehensively regulated by federal law, or inconsistently applying in a particular case. For example, a Maryland statute requiring importers to obtain a license to resell imported articles conflicted with the federal power to regulate foreign commerce.
In Australia, Section 109 of the Constitution addresses conflicting state and Commonwealth laws, stating that the Commonwealth law prevails, and the conflicting parts of the state law become inoperative. However, determining the existence of an inconsistency can be challenging, and judicial debates have addressed various subjects, including IVF laws and hot air balloon regulations.
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The Supremacy Clause
In conclusion, the Supremacy Clause ensures federal supremacy by establishing the Constitution and federal laws as the supreme law of the land, giving federal law precedence over conflicting state laws, and providing for the interpretation and enforcement of treaties as part of US federal law.
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State laws held unconstitutional
The U.S. Constitution is the nation's fundamental law, and any laws passed by Congress that conflict with it are deemed unconstitutional. Courts have the responsibility to interpret the Constitution's meaning, as well as the meaning of any laws passed by Congress.
The Supremacy Clause, which states that federal law prevails over conflicting state law, has been an essential bedrock of the structural Constitution. This means that federal law is supreme, and state laws that conflict with federal statutes or treaties are void.
There are several examples of state laws being held unconstitutional:
- United States v. Peters (1809): A Pennsylvania statute prohibiting the execution of any process issued to enforce a federal court's sentence on the ground that the federal court lacked jurisdiction was deemed unconstitutional.
- Fletcher v. Peck (1810): A Georgia statute annulling the conveyance of public lands authorized by a prior enactment violated the Contracts Clause of the Constitution.
- Dartmouth College v. Woodward (1819): A New Hampshire law that altered a charter granted to a private corporation by the British Crown before the Revolution was held unconstitutional as it violated the Contracts Clause.
- Farmers' and Mechanics' Bank v. Smith (1821): A Pennsylvania insolvency law that purported to discharge a debtor from obligations contracted before its passage violated the Contracts Clause.
- Brown v. Maryland (1827): A Maryland statute requiring an importer to obtain a licence before reselling imported articles in their original packaging conflicted with federal power to regulate foreign commerce and the constitutional prohibition on states levying import duties.
- Bank of Commerce v. New York City (1863): A New York law that included the value of securities of the United States in the capital of a bank subjected to taxation was rendered void as taxation on U.S. securities is prohibited.
- Bank Tax Case (1865): An 1863 New York law, enacted after the Bank of Commerce decision, was held invalid as it effectively taxed the securities of the United States.
- A Louisiana Reconstruction Act: A law prohibiting interstate common carriers of passengers from discriminating on the basis of race or colour was held invalid as a regulation of interstate commerce.
- A Tennessee law: A statute increasing the tax on a bank above the rate specified in its charter was held to impair the obligation of that contract.
- A North Carolina constitutional provision: A law increasing the amount of a debtor's property exempt from sale under the execution of a judgment impaired the obligation of contracts negotiated before its adoption.
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Acts of Congress held unconstitutional
The U.S. Constitution is the nation's fundamental law, and if any law passed by Congress conflicts with it, the Constitution takes precedence. The Federalist #78 states:
> [W]here the will of the legislature, declared in its statutes, stands in opposition to that of the people, declared in the Constitution, the judges ought to be governed by the latter rather than the former. They ought to regulate their decisions by the fundamental laws, rather than by those which are not fundamental.
The Supreme Court has applied this principle throughout history, holding Congress acts unconstitutional in whole or in part. Here are some examples:
Jones v. Meehan, 175 U.S. 1 (1899)
A provision authorizing the Secretary of the Interior to approve a second lease of certain lands in Minnesota interfered with the judicial interpretation of treaties under Article III, § 2, clause 1, and was deemed repugnant to the Fifth Amendment.
Act of August 27, 1894 (28 Stat. 553–60, §§ 27–37)
The income tax provisions of the tariff act of 1894 were deemed a direct tax within the meaning of the Constitution and, therefore, unconstitutional and void because they were not apportioned according to representation.
Leary v. United States, 395 U.S. 6 (1969)
A provision of the Narcotic Drugs Import and Export Act was held unconstitutional under the Due Process Clause of the Fifth Amendment. The provision created a presumption that the possessor of marijuana was aware of its illegal importation, but it was not shown that all marijuana in the U.S. was of foreign origin.
United States v. Brown, 381 U.S. 437 (1965)
A provision of the Labor-Management Reporting and Disclosure Act of 1959 was deemed unconstitutional as it made it a crime for a Communist Party member to serve as an officer or employee of a labor union, except for clerical or custodial positions. This was considered a bill of attainder.
City of Boerne v. Flores, 521 U.S. 507 (1997)
The Religious Freedom Restoration Act (RFRA) was deemed "so far out of proportion to a supposed remedial or preventive object that it cannot be understood as responsive to, or designed to prevent, unconstitutional behavior."
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The Bill of Rights
The amendments in the Bill of Rights include:
- Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof.
- Congress shall make no law abridging the freedom of speech, or of the press.
- The right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
- The right of the people to keep and bear arms.
- No Soldier shall, in time of peace, be quartered in any house, without the consent of the owner.
- The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures.
The Supremacy Clause of the Constitution of the United States (Article VI, Clause 2) establishes that the Constitution, federal laws, and treaties made under its authority are the "supreme Law of the Land", taking priority over any conflicting state laws. Federal statutes and treaties, however, must be within the parameters of the Constitution and not violate constitutional limits on federal power, such as the Bill of Rights. The United States Supreme Court has the power of judicial review, allowing it to invalidate a statute for violating a provision of the Constitution.
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Frequently asked questions
No one. The U.S. Constitution is the nation's fundamental law, and any law passed by Congress that conflicts with it is invalid.
The Supreme Court has the power of judicial review, meaning it can invalidate a statute for violating a provision of the Constitution.
The Supremacy Clause of the Constitution establishes that the Constitution, federal laws made pursuant to it, and treaties made under its authority, constitute the "supreme Law of the Land", and thus take priority over any conflicting state laws.
The Supremacy Clause also applies here, and the state law would be invalidated.

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