
The US government is divided into three branches: the legislative, executive, and judicial. Each branch has its own roles and areas of authority, and they work together within a system of checks and balances to ensure that no individual or group has too much power. The legislative branch is made up of Congress, the Senate, and the House of Representatives, and they are responsible for creating laws. The executive branch is led by the President, who is the head of state, leader of the federal government, and Commander-in-Chief of the armed forces. The judicial branch, on the other hand, has the power to decide if laws are constitutional and to overturn unconstitutional laws. This branch is made up of the Supreme Court and lower federal courts established by Congress. The Supreme Court's power to declare laws unconstitutional is known as judicial review, and it plays a crucial role in maintaining the balance of power between the three branches of government.
| Characteristics | Values |
|---|---|
| Branch | Judicial |
| Power | Supreme Court's ability to conduct judicial review |
| Established by | Article III of the Constitution |
| Main job | To decide if laws are constitutional |
| Jurisdiction | Original and appellate |
| Original jurisdiction | Cases between two or more states, cases involving ambassadors and other public ministers |
| Appellate jurisdiction | Almost any other case involving a point of constitutional and/or federal law |
| Examples of appellate jurisdiction cases | Cases to which the US is a party, cases involving treaties, cases involving ships on the high seas and navigable waterways (admiralty cases) |
| Role | Ensuring that each branch of government recognizes the limits of its own power, protecting civil rights and liberties, and setting appropriate limits on democratic government |
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What You'll Learn

The Supreme Court
The decisions of the Supreme Court have a significant impact on society, including in areas such as civil rights and liberties. For example, the Court has struck down laws that violate freedom of speech, freedom of religion, and due process. The Court also plays a role in ensuring that the changing views of a majority do not undermine fundamental values and in setting limits on democratic government.
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Judicial review
The US Constitution establishes a federal judiciary with the creation of the Supreme Court, which is the highest court in the nation and is vested with judicial powers. The Supreme Court plays a crucial role in the constitutional system of government. It acts as the court of last resort and ensures that each branch of government respects its limits by striking down laws that violate the Constitution. The justices of the Supreme Court are appointed by the President and confirmed by the Senate, serving for life with their salaries protected during their term.
Through judicial review, a court can invalidate laws, acts, or governmental actions that are incompatible with a higher authority. This includes declaring executive decisions unlawful or statutes unconstitutional. Judicial review can also be exercised indirectly, where a court finds that a challenged rule or action is inconsistent with other laws or established legal principles, indicating that it could not have been intended by the legislature.
The concept of judicial review has been adopted and adapted in various forms by different countries, particularly after World War II. While some countries, like France, established constitutional councils, others, such as Germany, Italy, and South Korea, created special constitutional courts. The United States is known for its strong powers of judicial review, which have influenced other nations to adopt similar systems to ensure democratic ideals and protect fundamental rights.
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Checks and balances
The US Constitution divides the federal government into three branches: the legislative, executive, and judicial. This separation of powers ensures that no individual or group will have too much power. Each branch has its own roles and areas of authority, and each can change acts of the other branches, providing a system of checks and balances.
The legislative branch is made up of Congress (the Senate and House of Representatives) and special agencies and offices that provide support services to Congress. Congress passes laws, which are then signed by the President.
The executive branch is headed by the President, who is the leader of the federal government and Commander-in-Chief of the armed forces. The President can veto legislation created by Congress, and also nominates heads of federal agencies and high court appointees.
The judicial branch is established by Article III of the Constitution, which states that "The judicial Power of the United States shall be vested in one supreme Court, and in such inferior Courts as the Congress may from time to time ordain and establish." The Supreme Court is the highest court in the nation and has the power of judicial review, or the ability to declare a Legislative or Executive act in violation of the Constitution. This power is not explicitly granted by the Constitution but was established by the Court in the case of Marbury v. Madison in 1803. The Supreme Court's main job is to decide if laws are constitutional, thereby providing checks and balances on the legislative and executive branches.
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Separation of powers
The US Constitution divides the federal government into three branches: the legislative, executive, and judicial. This separation of powers ensures that no individual or group has too much power. Each branch has its own distinct roles and areas of authority.
The legislative branch is made up of Congress (the Senate and House of Representatives) and special agencies and offices that provide support services to Congress. Congress passes federal laws, which are then signed by the President, who is the head of the executive branch. The President is also the Commander-in-Chief of the US armed forces and can nominate heads of federal agencies and high court appointees, including Supreme Court justices, subject to confirmation by the Senate.
The judicial branch, headed by the Supreme Court, has the power of judicial review, which allows it to decide if laws are constitutional and to overturn unconstitutional laws. This power is not explicitly granted by the Constitution but was established in the Marbury v. Madison case of 1803. The Supreme Court also has original jurisdiction over certain cases, such as suits between states or cases involving ambassadors, and appellate jurisdiction over almost all other cases involving points of constitutional or federal law.
The separation of powers is maintained through a system of checks and balances, where each branch can respond to the actions of the others. For example, Congress can remove the President from office in exceptional circumstances, and the Supreme Court can overturn laws passed by Congress if they are found to be unconstitutional. This system ensures that each branch recognises the limits of its power and prevents any one branch from overpowering the others.
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Congress and the Supreme Court
Congress is the central law-making body of the US government. It writes and debates the laws that govern the country, and it can override presidential vetoes. The Senate also has the power to confirm or reject presidential nominees for the heads of federal agencies, federal judges, and the Supreme Court. The president nominates Supreme Court justices, but the Senate has the sole power to confirm those appointments. Congress can also impeach and try members of the federal judiciary, including Supreme Court justices, for "high crimes and misdemeanors".
The Supreme Court is the highest court in the nation and is vested with the judicial powers of the government. When the Supreme Court rules over a case, it interprets the laws and decides if they fit the meaning of the Constitution. This ability to decide if a law violates the Constitution is called judicial review. The Supreme Court made a ruling in 1803 on a case called Marbury v. Madison that clearly stated the Court's power of judicial review.
Congress also has the authority to regulate Supreme Court ethics. It can enact ethics laws that safeguard the legitimacy of the Court by protecting the quality of its decision-making. Congress has the ultimate power to impeach and remove justices for bad behaviour.
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Frequently asked questions
The judicial branch, which includes the Supreme Court, has the authority to decide on the constitutionality of laws.
The Supreme Court has the power of judicial review, which means it can declare a law unconstitutional if it violates the Constitution.
The Supreme Court can choose whether or not to hear a case on appeal. If it decides to hear the case, it will review the law in question and determine if it is constitutional.
If the Supreme Court finds a law to be unconstitutional, it can overturn the law, or strike it down. This helps to ensure that the government recognizes the limits of its power and protects civil rights and liberties.














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