
The US Constitution is the oldest and longest-standing written and codified national constitution in the world. It has been amended 27 times and contains seven articles that define the basic framework of the federal government. The 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. The first article is the longest, with ten sections that outline the structure of the legislative branch and enumerate the powers to be exercised by the federal government. Article I also limits legislative power, with the ninth section prohibiting Congress from taxing imports or passing laws that favor one port over another.
| Characteristics | Values |
|---|---|
| Number of Articles | 7 |
| Longest Article | Article I |
| Number of Sections in Longest Article | 10 |
| Main Focus of the Articles | Defining the basic framework of the federal government |
| Article I Focus | Legislative branch and enumeration of powers to be exercised by the federal government |
| Article I, Section 9 Focus | Prohibiting Congress from taxing imports or passing laws that favor one port over another |
| Article I, Section 10 Focus | Prohibiting states from interfering with national fiscal and commercial policies and limiting their role in foreign relations |
| Article II Focus | Executive branch, consisting of the President and subordinate officers |
| Article III Focus | Judicial branch, consisting of the Supreme Court and other federal courts |
| Article IV Focus | Concepts of federalism, rights, and responsibilities of state governments |
| Article V Focus | Process of constitutional amendment |
| Article VI Focus | Relationship between the states and the federal government |
| Article VII Focus | Procedure for ratification by the 13 states |
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What You'll Learn

The US Constitution has 27 amendments
The US Constitution is the oldest and longest-standing national constitution in force in the world. It is comprised of seven articles that outline the basic framework of the federal government. The first three articles embody the doctrine of the separation of powers, dividing the government into three branches: the legislative, the executive, and the judicial.
The Constitution has been amended 27 times, with the first ten amendments, ratified in 1791, collectively known as the Bill of Rights. These amendments introduced fundamental protections, such as freedom of speech, religion, and assembly, and the right to bear arms. The Reconstruction Amendments (Amendments 13-15) were added following the Civil War to address issues related to slavery, citizenship, and voting rights.
The process of amending the Constitution is detailed in Article Five. Amendments must be proposed and ratified before becoming operative, either by a two-thirds majority vote in Congress or through a national convention called by Congress at the request of two-thirds of state legislatures. This process ensures a balance between flexibility and stability in governance.
The amendments have addressed a range of issues, such as taxation powers, prohibition of alcohol, and presidential term limits. They have also expanded civil rights, such as granting citizenship to former slaves and prohibiting voting discrimination based on race. The most recent amendment, the 27th, was ratified in 2020, addressing congressional salary increases.
The Constitution's longevity and adaptability demonstrate its enduring significance in shaping US governance and protecting the rights of its citizens.
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Article I is the longest article
Article I also limits legislative power. For example, the ninth section prohibits Congress from taxing imports or passing laws that favor one port over another. It also prohibits the suspension of the writ of habeas corpus, bills of attainder, and ex post facto laws. Article I is the only place in the original Constitution that addresses the right to vote.
The article's length and placement in the Constitution indicate that the Framers expected Congress to be the dominant institution of government. Creating Article I was a challenging and time-consuming process for the Constitutional Convention. The definition of legislative powers provoked long and heated debates, and the question of representation nearly brought the convention to a premature conclusion on several occasions.
The Great Compromise eventually paved the way for a bicameral Congress, in which the popularly-elected House was proportioned by population, and the Senate was chosen by state legislatures.
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Article I defines the legislative branch
Article I of the US Constitution defines the legislative branch of the federal government, which consists of the bicameral Congress. This article outlines the powers and responsibilities of Congress and includes various provisions related to lawmaking, taxation, and the protection of rights.
One key aspect of Article I is its establishment of Congress's role in lawmaking. It grants Congress the power to make all necessary laws to carry out the powers vested in the Constitution. This includes the ability to levy taxes, duties, and imposts, with certain restrictions and requirements, such as the limitation on direct taxes, which must be proportional to the population.
Article I also addresses the structure and procedures of Congress. It empowers each house to judge the elections, qualifications, and returns of its members and outlines the rules for conducting business, including the requirement for a majority to form a quorum. It grants each house the authority to determine its rules of proceeding and provides for the punishment of members for disorderly behaviour. Additionally, it addresses the journal-keeping responsibilities of each house and the publication of their proceedings, with provisions for maintaining secrecy when necessary.
Furthermore, Article I includes provisions related to the migration or importation of persons. Initially, it included a clause preventing Congress from restricting the importation of slaves until 1808, with a tax limitation on the importation. However, this clause was superseded by the Fourteenth Amendment, which granted citizenship to former slaves and imposed limits on state power regarding privileges, due process, and equal protection under the law.
Article I also covers topics such as the declaration of war, the establishment of inferior tribunals to the Supreme Court, the punishment of piracies and felonies, and the promotion of science and the arts by securing intellectual property rights for authors and inventors. Overall, Article I provides a comprehensive framework for the legislative branch of the US government, outlining its powers and responsibilities while also addressing specific issues related to lawmaking, taxation, and the protection of rights.
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Article I enumerates federal government powers
Article I of the US Constitution defines the legislative branch of the federal government, which consists of a bicameral Congress. This article enumerates the powers of Congress, including the power to lay and collect taxes, duties, imposts, and excises to pay off debts and provide for the common defence and general welfare of the United States. However, all duties, imposts, and excises must be uniform throughout the country.
Article I, Section 8 of the Constitution further outlines Congress's enumerated powers. These include the power to regulate commerce with foreign nations, Indian tribes, and among the states. Congress also has the power to establish uniform rules of naturalization and uniform laws on bankruptcy throughout the country.
In addition, Article I grants Congress the authority to raise and support armies, call forth the militia to execute the laws, suppress insurrections, and repel invasions. It also empowers Congress to declare war, grant letters of marque and reprisal, and make rules concerning captures on land and water.
Article I also addresses intellectual property rights, empowering Congress to "promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries." This includes the power to define and punish piracies and felonies committed on the high seas and offences against the law of nations.
It is worth noting that while Article I enumerates the powers of Congress, the Constitution also includes provisions that limit the power of Congress. For example, the Sixteenth Amendment removed constraints on Congress's ability to lay and collect income taxes, greatly expanding the scope of federal taxing and spending powers.
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Amendments are proposed by Congress
The US Constitution is the oldest and longest-standing national constitution in force in the world. It has been amended 27 times, with the first ten amendments being referred to as the Bill of Rights. Amendments are proposed by Congress whenever two-thirds of both Houses deem it necessary, or on the application of the legislatures of two-thirds of the several states. The Congress may then call a convention for proposing amendments, which become valid when ratified by the legislatures of three-fourths of the states.
The Constitution's first three articles embody the doctrine of the separation of powers, dividing the federal government into three branches: the legislative, consisting of the bicameral Congress (Article I); the executive, consisting of the President and subordinate officers (Article II); and the judicial, consisting of the Supreme Court and other federal courts (Article III).
Article I, the Constitution's longest article, lays out the structure of the legislative branch and enumerates the powers to be exercised by the federal government. Its length and placement in the Constitution indicate that the Framers expected Congress to be the dominant institution of government. Article I also limits legislative power. For example, the ninth section prohibits Congress from taxing imports or passing laws that favour one port over another.
The Sixteenth Amendment (1913) removed existing Constitutional constraints that limited the power of Congress to lay and collect taxes on income. The Fourteenth Amendment (1868) granted US citizenship to former slaves and all persons "subject to US jurisdiction". It also contained three new limits on state power, including that a state shall not violate a citizen's privileges or immunities and must guarantee all persons equal protection of the laws.
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Frequently asked questions
The US Constitution is a document that outlines the framework of the federal government and the separation of powers into three branches: the legislative, the executive, and the judicial.
The US Constitution has seven articles, with the first article being the longest.
Article I is the longest section of the US Constitution. It has ten sections that outline the structure and powers of the legislative branch, also known as Congress.
Article I, Section 8 outlines specific powers granted to Congress, such as the ability to levy taxes, borrow money, regulate commerce, and declare war. Section 9 of Article I also limits the powers of Congress by prohibiting certain actions, such as suspending the writ of habeas corpus or passing laws that favor one port over another.
The US Constitution has been amended 27 times. The process of amending the Constitution is outlined in Article V, which requires a proposal by Congress or a national convention and ratification by a specified number of states.








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