
The United States Constitution divides powers between the three branches of the federal government: the legislative, executive, and judicial branches. This separation of powers is one of the most well-known legal and political doctrines in constitutional law. The Founding Fathers devised this system to prevent tyranny by a single branch, promote effective governance, and protect the liberties of American citizens. Each branch has distinct functions and powers, with the legislative branch making laws, the executive branch led by the President, and the judicial branch interpreting laws and resolving disputes. This division of powers allows for checks and balances, ensuring that no one branch holds absolute power and enabling efficient governance.
| Characteristics | Values |
|---|---|
| Prevent tyranny from a single branch | Legislative, executive, and judicial |
| Preserve liberty | Legislative, executive, and judicial |
| Efficient and effective government | Legislative, executive, and judicial |
| Checks and balances | Legislative, executive, and judicial |
| Federalism | National government and the states |
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What You'll Learn

Preventing tyranny and preserving liberty
The division of powers in the US Constitution is a key feature of the document, designed to prevent tyranny and preserve liberty. The Constitution divides power in two ways: firstly, at the national level, power is divided between the three branches of government, and secondly, power is divided between the national government and the states under a system known as federalism.
The three branches of the US government are the legislative, executive, and judicial, each with separate powers and specified duties. This separation of powers allows each branch to perform its tasks efficiently and effectively, and also allows each branch to check the actions of the other two branches. This means that no single branch of government has all the political power, nor does one have absolute power over the others.
The legislative branch is outlined in Article I of the Constitution and consists of the US House of Representatives and the US Senate. The House of Representatives is composed of representatives proportionate to each state's population, while the Senate is organized under the principle of equal state representation, with each state receiving two senators regardless of its population.
Article II of the Constitution establishes the executive branch, which is vested in the President of the United States. The Framers, who had just witnessed George Washington lead the Continental Army to victory over the British, recognized the importance of a strong chief executive. They designed the office with Washington in mind, as he had successfully led the armed forces without becoming a dictator.
The judicial power is vested in the Supreme Court and any lower courts created by Congress. The Supreme Court has the authority to rule on whether one branch has usurped the authority of another in separation-of-powers cases, adopting a formalist approach that closely adheres to the structural divisions in the Constitution.
Federalism, on the other hand, is the system by which the Constitution divides political power between the national government and the states. While the Constitution does not explicitly mention the term "federalism", it is a fundamental principle that underpins the document. The Framers sought to establish a unified national government with limited powers, while maintaining a sphere of autonomy for state governments to exercise their authority. This balance between national and state powers is intended to increase the accountability of elected officials to citizens and protect individual liberties.
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Separation of powers between three branches
The Constitution divides powers between three branches of the US government: the legislative branch, the executive branch, and the judicial branch. This separation of powers is a well-known legal and political doctrine in constitutional law.
The legislative branch, outlined in Article I of the Constitution, is responsible for making laws. Congress, which consists of the House of Representatives and the Senate, holds legislative power. The House of Representatives is composed of representatives proportionate to each state's population, while each state receives equal representation in the Senate, with two senators each.
Article II of the Constitution establishes the executive branch, vesting power in the President of the United States. The Framers, influenced by George Washington's leadership during the Revolutionary War, designed the office with strong executive powers in mind.
The judicial branch, as outlined in Article III, includes the Supreme Court and any lower courts created by Congress. This branch is responsible for interpreting the laws and ensuring that the other branches do not exceed their constitutional powers.
By dividing powers among these three branches, the Framers of the Constitution aimed to prevent tyranny, promote effective governance, and preserve the liberties of US citizens. They sought to strike a balance between creating a more powerful national government while safeguarding individual freedoms. This system of checks and balances allows each branch to act independently but also to check the actions of the other branches, ensuring that no single branch holds absolute power.
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Checks and balances between branches
The US Constitution divides powers between the three branches of government – the legislative, executive, and judicial – to prevent tyranny and preserve liberty. This is known as the separation of powers.
The legislative branch, outlined in Article I of the Constitution, is responsible for making laws. Congress, which consists of the House of Representatives and the Senate, has been granted "all legislative powers" by the Constitution, although these powers are limited to those "herein granted".
Article II of the Constitution establishes the executive branch, vesting power in the President of the United States. The Framers, having witnessed George Washington lead the Continental Army to victory, recognised the importance of a strong chief executive. They designed the office with Washington in mind, ensuring that power was vested in one person rather than a committee.
The judicial branch, outlined in Article III of the Constitution, includes the Supreme Court and any lower courts created by Congress.
While each branch has separate powers, allowing them to perform their tasks efficiently and effectively, there is also some overlap. This allows each branch to "'check'" the actions of the other two branches, preventing any one branch from aggrandizing its power. This system of checks and balances ensures that no single branch has all or absolute political power, preserving individual liberty and protecting citizens' rights to life, liberty, and the pursuit of happiness.
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Federalism and power division between states and national government
Federalism is the term used to describe the US Constitution's system of dividing political power between the national government and the states. The Constitution does not explicitly use the word "federalism", but the concept is present throughout the document. The Tenth Amendment, for example, is a well-known provision that reserves powers not delegated to the United States by the Constitution, nor prohibited by it to the states, to the states or the people.
The Framers of the Constitution divided power between the national government and the states under a system known as federalism. They sought to establish a unified national government with defined but limited powers while maintaining a sphere of autonomy for state governments to exercise a general police power. This was done to prevent tyranny by a single branch of government and to preserve the liberty of US citizens.
The Constitution grants Congress, the legislative branch, the power to make laws. Congress is divided into two houses: the House of Representatives, which is composed of representatives proportionate to each state's population, and the Senate, which provides each state with equal representation, regardless of its population.
The Framers also divided power at the national level into three branches of government: the legislative, executive, and judicial branches. This separation of powers allows each branch to perform its tasks efficiently and effectively, and to check the actions of the other branches. The executive branch, for example, is outlined in Article II of the Constitution and vests power in the President of the United States.
While the Constitution divides powers between the national government and the states, as well as among the branches of the national government, it does not clearly delineate all the boundaries between the powers of the federal and state governments. Judges and scholars disagree on how the basic principles of federalism should be realised, and there is controversy over the role of the judiciary in enforcing the interests of the states against the federal government.
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The legislative branch's lawmaking powers
The legislative branch of the US government, established by Article I of the Constitution, consists of the House of Representatives and the Senate, which together form the United States Congress. The Constitution grants Congress the sole authority to enact legislation and make or change existing laws. This includes the power to tax and spend, borrow money, regulate interstate commerce, establish uniform rules on naturalization and bankruptcy, coin money, punish counterfeiters, establish post offices, regulate intellectual property, establish courts, punish maritime crimes, declare war, raise and support armies, govern enclaves, and make other laws necessary and proper for executing these powers.
The House of Representatives has several exclusive powers, including the power to initiate revenue bills, impeach federal officials, and elect the President in the case of an electoral college tie. The House is made up of representatives chosen every second year by the people of the states, with the number of representatives proportionate to each state's population. Representatives must be at least 25 years old, have been citizens of the US for at least seven years, and be inhabitants of the state they represent when elected.
The Senate, on the other hand, has the sole power to confirm the President's appointments and ratify treaties. It is composed of two Senators from each state, chosen by popular vote since the ratification of the 17th Amendment in 1913. Senators serve six-year terms, with about one-third of the Senate up for reelection every two years. Senators must be at least 30 years old, have been citizens of the US for at least nine years, and be residents of the state they represent.
To pass legislation, both the House and the Senate must pass the same bill by a majority vote. The bill is then sent to the President for their signature. The President may veto the bill, but Congress can override the veto by a two-thirds vote in both the Senate and the House of Representatives.
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Frequently asked questions
To prevent tyranny from a single branch and preserve individual liberty.
The legislative branch, the executive branch, and the judicial branch.
The legislative branch is responsible for making laws.
The executive branch is responsible for executing the laws made by the legislative branch.

























