
The Constitution of the United States grants extensive powers to the Judicial Branch, which is established by Article III. This article outlines the structure and function of the Judicial Branch, which includes the Supreme Court and inferior federal courts created by Congress. The Constitution grants the Judicial Branch the power to interpret the law, determine the constitutionality of laws, and apply them to individual cases. This includes cases arising under the Constitution, laws of the United States, and treaties made under their authority. The Judicial Branch also has jurisdiction over cases involving ambassadors, public ministers, and consuls, as well as admiralty and maritime cases. Additionally, Article III guarantees every person accused of wrongdoing the right to a fair trial before a competent judge and a jury of their peers. The Constitution also grants Congress the power to establish inferior courts and determine their jurisdiction, creating a system of checks and balances to ensure no single branch of government becomes too powerful.
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What You'll Learn

The power to declare punishment for treason
The US Constitution grants Congress the power to declare the punishment for treason. Treason is defined as levying war against the United States or aiding their enemies. No person can be convicted of treason without the testimony of two witnesses to the same overt act or a confession in open court.
The Constitution outlines that treason is a unique offense as it is the only crime expressly defined by the Constitution, and it only applies to Americans who have betrayed the allegiance they are presumed to owe the United States. The Constitution also narrowed the scope of punishment for treason compared to English common law. While Congress has the power to establish penalties for treason, they may not "work corruption of blood, or forfeiture except during the life of the person" convicted of treason. "Corruption of blood" refers to English common law, which prohibited family members from receiving or inheriting property from a person convicted of treason. The Constitution ensures that this punishment does not extend beyond the convicted person's lifetime.
The Framers of the Constitution recognized that national security offenses, such as treason, can inflame public passions. Therefore, these cases deserve heightened procedural protections. The Constitution grants the courts the power to hear cases requiring them to determine whether an individual is guilty of "levying war" against the United States. This power is derived from the Treason Clause, which gives Congress the authority to declare war and the courts the authority to adjudicate treason cases.
In conclusion, the power to declare the punishment for treason is vested in Congress, with specific guidelines outlined in the Constitution to ensure proportionality and fairness in sentencing. The judicial branch, through the courts, plays a crucial role in adjudicating treason cases and ensuring that the rights of the accused are protected.
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The right to a fair trial
The Constitution grants the Judicial Branch the power to extend to all cases in law and equity that arise under the Constitution, the laws of the United States, and treaties made under their authority. This includes cases involving ambassadors, public ministers, and consuls, as well as those that fall under admiralty and maritime jurisdiction. The Judicial Branch also has the power to hear controversies between states, between a state and citizens of another state, and between citizens of different states, among other specified cases.
The Sixth Amendment to the Constitution, ratified on December 15, 1791, outlines several rights that citizens are entitled to in criminal trials, thus ensuring the right to a fair trial. This includes the right to a speedy and public trial by an impartial jury from the local community, the right to be informed of the criminal charges and the nature of the accusation, the right to confront witnesses during the trial and have witnesses appear, and the right to legal representation.
The Sixth Amendment also stipulates that the accused shall be tried by an impartial jury of the state and district in which the crime was committed, with the district being previously ascertained by law. This ensures that the jury is composed of individuals who are not personally connected to the case and can make an impartial decision.
In summary, the Constitution grants the Judicial Branch the authority to preside over a wide range of cases and controversies, while the Sixth Amendment ensures that citizens accused of crimes have specific rights, including the right to a fair and impartial trial, legal representation, and due process. These rights are fundamental to the US justice system and are designed to protect citizens and ensure a fair legal process.
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Judicial review
Article III of the US Constitution establishes the federal government's judicial branch, outlining its structure and function. This article grants the judicial power of the United States to a single Supreme Court and such inferior courts as Congress may establish from time to time. While the Constitution only mentions the Supreme Court, it empowers Congress to create lower or inferior courts as needed, recognising the need for a federal judiciary.
The judicial power, or jurisdiction, is the authority to hear and determine the subject matter in controversy between parties to a suit, and to render dispositive judgments. This power extends to a wide range of cases, including those arising under the Constitution, laws of the United States, and treaties made under their authority. It covers cases involving ambassadors, public ministers, and consuls, as well as admiralty and maritime jurisdiction. The judiciary also handles controversies where the United States is a party, disputes between states, and cases between citizens of different states or the same state claiming lands under grants of different states.
In some cases, the Constitution grants the Supreme Court original jurisdiction, which cannot be overruled by Congress. For example, in disputes between two or more states, the Supreme Court has the authority to hear and decide the matter directly. However, Congress generally determines the jurisdiction of the federal courts, and cases typically proceed through district courts and appellate courts before reaching the Supreme Court.
The judicial branch plays a crucial role in safeguarding democracy and the rule of law in the United States. Through its power of judicial review, the judiciary ensures that the legislative and executive branches do not exceed their authority and protects the rights of citizens. This system of checks and balances prevents any single branch of government from becoming too powerful.
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Jurisdiction over cases involving ambassadors, ministers, and consuls
The Constitution grants the Judicial Branch, or the Supreme Court, original jurisdiction over cases involving ambassadors, other public ministers, and consuls. This means that the Supreme Court has the authority to hear and determine the subject matter in these cases, as well as to render a binding decision. This power is derived directly from the Constitution and is one of the key roles of the Judicial Branch.
The Supreme Court's jurisdiction in these cases has been original but not exclusive since 1978. This means that while the Supreme Court has the power to hear these cases first, other courts may also have concurrent jurisdiction. For example, suits in state courts against consular officials are not precluded by the Supreme Court's original jurisdiction.
The Supreme Court's original jurisdiction in cases involving ambassadors, ministers, and consuls has raised several legal questions over the years. One question is whether the Court has jurisdiction over cases where an ambassador or consul has only an indirect interest in the outcome, rather than being a party in interest. In United States v. Ortega, the Court ruled that a prosecution for violence against a foreign minister was a public prosecution for vindication of international law and US law, rather than a suit affecting the minister.
Another question is whether the Supreme Court can determine the official status of an individual claiming to be an ambassador or public minister. The Court has generally refused to review the decision of the Executive Branch in such cases, instead accepting a certificate from the Department of State.
Additionally, the Supreme Court has held that its jurisdiction in these cases applies only to persons accredited to the United States by foreign governments, rather than US ambassadors and consuls accredited to foreign governments. This further clarifies the scope of the Supreme Court's original jurisdiction in cases involving ambassadors, ministers, and consuls.
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Jurisdiction over controversies between states
The US Constitution grants the judicial branch the power to preside over controversies between states. This power is derived from Article III, Section 2, Clause 1 of the US Constitution, which outlines the scope of judicial power. The clause states that the judicial branch has the authority to hear cases "in Law and Equity, arising under this Constitution, the Laws of the United States, and Treaties made". This includes controversies between two or more states, as well as those between a state and citizens of another state, and between citizens of different states.
The Supreme Court has original jurisdiction in these matters, meaning it is the first court to hear such cases. This is because individual states do not have jurisdiction over one another, and state courts cannot hear cases involving another state. The Constitution, therefore, tasks the Supreme Court with handling disputes between state governments.
The extension of federal judicial power to controversies between states is rooted in historical experience. Prior to independence, disputes between colonies claiming charter rights to territory were settled by the Privy Council. Under the Articles of Confederation, Congress was designated as the final authority to resolve disputes between states, acting as an ad hoc arbitral court. When the Philadelphia Convention met in 1787, serious disputes over boundaries, lands, and river rights involved ten states, further emphasising the need for a federal judicial power to address controversies between states.
The Supreme Court has ruled on several notable cases involving controversies between states. In Texas v. New Jersey, the Court adjudicated a multistate dispute over the escheat of intangible property consisting of uncollected small debts held by a corporation. In Missouri v. Illinois & Chicago District, the Court sustained jurisdiction to entertain an injunction suit to restrain the diversion of water from a river. However, in Alabama v. Arizona, the Court declined jurisdiction, indicating that it would only exercise jurisdiction in suits between states when absolutely necessary and that the requirements for a suit between states are more exacting than in suits between private persons.
While the Supreme Court has original jurisdiction in controversies between states, Congress plays a role in determining the extent of federal court jurisdiction. The Constitution sets the maximum extent of federal court jurisdiction, but Congress has discretion to grant a lesser amount of jurisdiction than what is authorised. This is true for all constitutional grants of federal court jurisdiction, except for the limited grant of original jurisdiction to the Supreme Court.
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Frequently asked questions
Judicial Power is the power "of a court to decide and pronounce a judgment and carry it into effect between persons and parties who bring a case before it for decision". It is the authority to render dispositive judgments.
The Judicial Branch is established by Article III of the Constitution. It establishes a framework for its interaction with other branches of the government. It ensures that no single branch of the government accumulates excessive power. It also guarantees every person accused of wrongdoing the right to a fair trial.
Congress determines the jurisdiction of the federal courts. Congress can also establish inferior courts to the Supreme Court, such as the United States district courts and the courts of appeals. Congress also has the power to declare the punishment for treason.

























