
The US Constitution is the oldest written national constitution in operation, completed in 1787 and ratified in June 1788. It is the fundamental law of the US federal system of government and a landmark document of the Western world. The Constitution establishes a federal government with three branches: legislative, executive, and judicial. It outlines the basic framework of the federal government, including the powers and responsibilities of each branch, the rights and freedoms of citizens, and the process for amending the Constitution. The Constitution has been amended 27 times since 1789, including the addition of the Bill of Rights and amendments to abolish slavery, guarantee equal protection under the law, and ensure the right to vote regardless of race and gender.
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What You'll Learn

The US Constitution is the foundation of the federal government
The US Constitution is the oldest written national constitution still in operation, completed in 1787 and ratified in 1788. It is the fundamental law of the US federal system of government and supersedes the Articles of Confederation, the nation's first constitution. The Constitution establishes the framework for the federal government and outlines the rights and responsibilities of its citizens.
The Constitution is divided into seven articles, with the first three embodying the doctrine of the separation of powers. The legislative branch is made up of the bicameral Congress (Article I), the executive branch (Article II) consists of the President and subordinate officers, and the judicial branch (Article III) consists of the Supreme Court and other federal courts.
Article I also describes the organization of Congress and its specific powers, known as enumerated or delegated powers. It lists the powers denied to Congress and the states, and through the necessary and proper clause (also called the elastic clause), Congress can make laws to carry out its enumerated powers. Article I also includes the process for electing representatives and the qualifications required to hold office.
Article II deals with the executive branch and describes the election of the President and Vice President, the qualifications for holding office, and the procedures if a President can no longer serve. The powers of the President include serving as commander-in-chief of the army and navy, making treaties, and appointing ambassadors, officials, and Supreme Court justices, with the advice and consent of the Senate.
Article III establishes the Supreme Court and other federal courts, which have the power to interpret the Constitution and declare acts of Congress unconstitutional. The Constitution also provides for the addition of new states to the union and guarantees each state a republican form of government.
The Constitution has been amended 27 times since 1789, including the Bill of Rights, which consists of the first 10 amendments adopted in 1791. Other notable amendments include the 13th Amendment abolishing slavery, the 14th Amendment requiring due process and equal protection under the law, the 15th Amendment guaranteeing the right to vote regardless of race, and the 19th Amendment instituting women's suffrage.
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It defines the framework of the federal government
The US Constitution is a fundamental law of the federal system of government in the US. It is the oldest written national constitution in operation, completed in 1787 at the Constitutional Convention of 55 delegates who met in Philadelphia. The Constitution ratified in June 1788, superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789.
The Constitution's first three articles embody the doctrine of the separation of powers, dividing the federal government into three branches: the legislative, executive, and judicial. The legislative branch consists of the bicameral Congress (Article I), the executive branch consists of the president and subordinate officers (Article II), and the judicial branch consists of the Supreme Court and other federal courts (Article III).
Article I, the longest in the Constitution, vests legislative power in the Senate and the House of Representatives. It describes the organization of Congress and lists its specific powers, known as enumerated or delegated powers. It also lists the powers denied to Congress and the states. Article I, Section 2, creates the way in which congressional districts are to be divided among the states.
Article II deals with the executive branch and describes the election of the president and vice president, the qualifications for holding office, and the procedures if a president can no longer serve. The powers of the president include serving as commander-in-chief of the army and navy, making treaties, and, with the "advice and consent of the Senate," appointing ambassadors, officials, and Supreme Court justices.
Article III establishes the Supreme Court and other federal courts. The courts have jurisdiction over actions by government officers and state law, and federal courts may rule on whether branches of the national government conform to the Constitution. The Supreme Court has the power to declare acts of Congress unconstitutional.
Articles IV, V, and VI embody concepts of federalism, describing the rights and responsibilities of state governments, the states in relation to the federal government, and the shared process of constitutional amendment. Article IV provides for adding new states to the union, guarantees each state a republican form of government, and ensures protection against invasion or domestic violence. Article V outlines the process for amending the Constitution, which includes proposals, adoption, and ratification. Article VI establishes the Constitution, the laws of the United States, and treaties entered into by the US as the supreme law of the land.
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It is a 'living' document that can be amended
The US Constitution is a living document that can be amended, and has been amended many times since its inception. The Constitution's first three articles embody the doctrine of the separation of powers, dividing the federal government into three branches: the legislative, the executive, and the judicial. Amendments to the Constitution are made through a two-step process. Firstly, a proposal must be adopted either by Congress with a two-thirds majority in both the Senate and the House of Representatives, or by a national convention, which is called when two-thirds of state legislatures request one. Secondly, the proposal must be ratified by the states, requiring three-fourths of the states' approval through the consent of state legislatures or state ratifying conventions.
The Constitution's main provisions include seven articles that define the basic framework of the federal government. Articles that have been amended retain the original text, although provisions repealed by amendments are usually marked to indicate they no longer apply. Despite these changes, the focus of each Article remains the same as when they were adopted in 1787.
The Constitution's first three words, "We the People," emphasise that the nation is to be ruled by the people, not a monarch or dictator. The preamble outlines the general goals of the framers: to create a just government, ensure peace, provide an adequate national defence, and secure the blessings of liberty for the people.
The Constitution has been amended 27 times since 1789. Notable amendments include the Bill of Rights, the 13th Amendment abolishing slavery, the 14th Amendment requiring due process and equal protection under the law, the 15th Amendment guaranteeing the right to vote regardless of race, the 19th Amendment instituting women's suffrage, and the 22nd Amendment limiting the presidency to two terms.
The Supreme Court plays a crucial role in interpreting the Constitution and ensuring its enforcement. It has the power to declare acts of Congress unconstitutional and provide guidance on basic problems of governance in a democracy. The Court's role is to balance its authority with that of the President and Congress, ensuring that federal officers are held accountable while avoiding asserting superiority.
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The first three articles embody the separation of powers
The US Constitution is a document that outlines the general goals of the framers: to create a just government, to ensure peace, to establish an adequate national defence, and to ensure a healthy, free nation. The first three words of the preamble, "We the People", emphasise that the nation is to be ruled by the people and not a king or dictator.
The first three articles of the US Constitution embody the separation of powers, a well-known legal and political doctrine in constitutional law. The framers of the Constitution divided the federal government's powers between three separate branches of government: the legislative, the executive, and the judicial. This structure was intended to prevent tyranny by a single branch, lead to effective governance, and preserve the liberty of US citizens.
Article I vests legislative power in the Senate and the House of Representatives, describing the organisation of Congress and listing its specific powers, known as enumerated or delegated powers. It also includes the necessary and proper clause, or elastic clause, which allows Congress to make laws necessary to carry out its enumerated powers. Additionally, Article I lists the powers denied to Congress and the states.
Article II deals with the executive branch, describing the election of the president and vice president, the qualifications for holding office, and the procedures if a president can no longer serve. The president's powers include serving as commander-in-chief of the army and navy, making treaties, and appointing ambassadors, officials, and Supreme Court justices with the advice and consent of the Senate.
Article III states that judicial power "shall be vested in one supreme Court, and in such inferior Courts as the Congress may from time to time ordain and establish." This means that judges and juries have the power to interpret laws and apply them independently, without influence from the president or Congress.
The separation of powers allows each branch of government to perform its tasks efficiently and effectively, while also providing a system of checks and balances, ensuring that no single branch holds all the political power or has absolute authority over the others. This structure has been influential, with many countries basing their constitutions on the US model.
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The first 10 amendments are known as the Bill of Rights
The US Constitution is a document that outlines the general goals of its framers: to create a just government and to ensure peace, an adequate national defence, and a healthy, free nation. The Constitution establishes legislative power in the Senate and the House of Representatives, and outlines the organisation of Congress, the election of the president, and the powers of the president.
The first 10 amendments to the Constitution are known as the Bill of Rights. James Madison wrote these amendments to limit government power and protect individual liberties. The First Amendment, for example, protects the freedom of speech, the freedom of religion, and the right to peaceful assembly. The Second Amendment protects the right to bear arms, and the Third Amendment prevents the government from forcing homeowners to allow soldiers to use their homes. The Fourth Amendment protects citizens' right to be free from unreasonable government intrusion in their homes, and the Fifth Amendment provides several protections for people accused of crimes, such as the right against self-incrimination and the right to due process. The Sixth Amendment provides additional protections for people accused of crimes, including the right to a speedy and public trial and trial by an impartial jury. The Ninth Amendment states that citizens have other rights beyond those explicitly listed in the Constitution, and the Tenth Amendment says that the Federal Government only has the powers delegated to it by the Constitution.
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Frequently asked questions
The US Constitution is the fundamental law of the US federal system of government. It is the oldest written national constitution still in operation, completed in 1787 and ratified in 1788.
The US Constitution outlines the basic framework of the federal government and the rights and responsibilities of its citizens. It establishes the doctrine of the separation of powers, dividing the government into three branches: legislative, executive, and judicial.
The US Constitution has been amended 27 times since 1789. Notable amendments include the Bill of Rights (1791), the 13th Amendment abolishing slavery (1865), the 14th Amendment requiring due process and equal protection under the law (1868), and the 19th Amendment instituting women's suffrage (1920). The process for amending the Constitution involves proposals being adopted and ratified, with the states responsible for the final ratification.

























