When deriving meaning from the text of the Constitution, the Supreme Court has relied on certain "methods" or "modes" of interpretation—that is, ways of figuring out a particular meaning of a provision within the Constitution. This report broadly describes the most common modes of constitutional interpretation; discusses examples of Supreme Court decisions that demonstrate the application of these methods; and provides a general overview of the various arguments in support of, and in opposition to, the use of such methods by the Court. Textualism

Textualism is a mode of legal interpretation that focuses on the plain meaning of the text of a legal document. Textualism usually emphasizes how the terms in the Constitution would be understood by people at the time they were ratified, as well as the context in which those terms appear. Textualists usually believe there is an objective meaning of the text, and they do not typically inquire into questions regarding the intent of the drafters, adopters, or ratifiers of the Constitution and its amendments when deriving meaning from the text. Original Meaning

Whereas textualist approaches to constitutional interpretation focus solely on the text of the document, originalist approaches consider the meaning of the Constitution as understood by at least some segment of the populace at the time of the Founding. Originalists, however, generally agree that the Constitution's text had an "objectively identifiable" or public meaning at the time of the Founding that has not changed over time, and the task of judges and Justices (and other responsible interpreters) is to construct this original meaning. Judicial Precedent

The most commonly cited source of constitutional meaning is the Supreme Court's prior decisions on questions of constitutional law. For most, if not all Justices, judicial precedent provides possible principles, rules, or standards to govern judicial decisions in future cases with arguably similar facts. That is, pragmatist approaches often involve the Court weighing or balancing the probable practical consequences of one interpretation of the Constitution against other interpretations. One flavor of pragmatism weighs the future costs and benefits of an interpretation to society or the political branches, selecting the interpretation that may lead to the perceived best outcome. Using another type of pragmatist approach, a court might consider the extent to which the judiciary could play a constructive role in deciding a question of constitutional law. . . without due process of law." National Identity or "National Ethos"

Another approach to interpretation that is closely related to but conceptually distinct from moral reasoning is judicial reasoning that relies on the concept of a "national ethos." Structuralism

One of the most common modes of constitutional interpretation is based on the structure of the Constitution. Indeed, drawing inferences from the design of the Constitution gives rise to some of the most important relationships that everyone agrees the Constitution establishes—the relationships among the three branches of the federal government (commonly called separation of powers or checks and balances); the relationship between the federal and state governments (known as federalism); and the relationship between the government and the people. Prior decisions of the political branches, particularly their long-established, historical practices, are an important source of constitutional meaning to many judges, academics, and lawyers. Indeed, courts have viewed historical practices as a source of the Constitution's meaning in cases involving questions about the separation of powers, federalism, and individual rights, particularly when the text provides no clear answer.
When exercising its power to review the constitutionality of governmental action, the Supreme Court has relied on certain "methods" or "modes" of interpretation—that is, ways of figuring out a particular meaning of a provision within the Constitution. This report broadly describes the most common modes of constitutional interpretation; discusses examples of Supreme Court decisions that demonstrate the application of these methods; and provides a general overview of the various arguments in support of, and in opposition to, the use of such methods of constitutional interpretation.
Textualism. Textualism is a mode of interpretation that focuses on the plain meaning of the text of a legal document. Textualism usually emphasizes how the terms in the Constitution would be understood by people at the time they were ratified, as well as the context in which those terms appear. Textualists usually believe there is an objective meaning of the text, and they do not typically inquire into questions regarding the intent of the drafters, adopters, or ratifiers of the Constitution and its amendments when deriving meaning from the text.
Original Meaning. Whereas textualist approaches to constitutional interpretation focus solely on the text of the document, originalist approaches consider the meaning of the Constitution as understood by at least some segment of the populace at the time of the Founding. Originalists generally agree that the Constitution's text had an "objectively identifiable" or public meaning at the time of the Founding that has not changed over time, and the task of judges and Justices (and other responsible interpreters) is to construct this original meaning.
Judicial Precedent. The most commonly cited source of constitutional meaning is the Supreme Court's prior decisions on questions of constitutional law. For most, if not all Justices, judicial precedent provides possible principles, rules, or standards to govern judicial decisions in future cases with arguably similar facts.
Pragmatism. Pragmatist approaches often involve the Court weighing or balancing the probable practical consequences of one interpretation of the Constitution against other interpretations. One flavor of pragmatism weighs the future costs and benefits of an interpretation to society or the political branches, selecting the interpretation that may lead to the perceived best outcome. Under another type of pragmatist approach, a court might consider the extent to which the judiciary could play a constructive role in deciding a question of constitutional law.
Moral Reasoning. This approach argues that certain moral concepts or ideals underlie some terms in the text of the Constitution (e.g., "equal protection" or "due process of law"), and that these concepts should inform judges' interpretations of the Constitution.
National Identity (or "Ethos"). Judicial reasoning occasionally relies on the concept of a "national ethos," which draws upon the distinct character and values of the American national identity and the nation's institutions in order to elaborate on the Constitution's meaning.
Structuralism. Another mode of constitutional interpretation draws inferences from the design of the Constitution: the relationships among the three branches of the federal government (commonly called separation of powers); the relationship between the federal and state governments (known as federalism); and the relationship between the government and the people.
Historical Practices. Prior decisions of the political branches, particularly their long-established, historical practices, are an important source of constitutional meaning. Courts have viewed historical practices as a source of the Constitution's meaning in cases involving questions about the separation of powers, federalism, and individual rights, particularly when the text provides no clear answer.