Separation of Powers: How the Constitution Divides Government

TL;DR: Separation of Powers is the constitutional principle that divides the federal government into three branches: the legislative, executive, and judicial branches. Each is vested with distinct powers and responsibilities.

The Framers designed this structure to prevent the concentration of governmental authority and protect liberty. The branches are not completely independent; instead, the Constitution gives them overlapping powers that allow them to check and restrain one another.

Alongside federalism, elections, limited governmental powers, Judicial Review, and constitutional rights, these safeguards create a system designed to prevent excessive concentrations of governmental power.

Key Takeaways

• Separation of Powers divides federal authority among three branches: Congress, the President and executive branch, and the federal judiciary.

• The first three Articles of the Constitution establish the three branches. Article I establishes Congress, Article II establishes the executive branch, and Article III establishes the federal judiciary.

• The Framers were concerned about concentrated governmental power. Their thinking was influenced by English constitutional history, colonial experience, Enlightenment political thought, earlier American constitutional documents, and the experience of governing under the Articles of Confederation.

• Separation of Powers does not mean complete isolation. The branches have distinct responsibilities but interact through constitutionally defined powers.

• Checks and Balances are related to, but distinct from, Separation of Powers. Separation of Powers divides governmental authority; Checks and Balances provides mechanisms through which the branches can restrain or influence one another.

• Federalism provides another layer of protection against concentrated power by dividing authority vertically between the federal government and the states.

• Judicial Review allows federal courts to determine whether governmental actions are consistent with the Constitution in cases properly before them.

• The constitutional system is designed to produce some governmental friction. Conflict between branches does not necessarily indicate failure; in some circumstances, it reflects the operation of the constitutional restraints the Framers established.

Introduction

What does separation of powers mean?

America’s framers established a system of separation of powers in the Constitution to divide the national government into three distinct branches with distinct powers. Those three branches are the legislative, executive, and judicial.

The separation of powers provides different responsibilities and powers to each branch, helping preserve liberty by drawing boundaries around the amount of authority each branch holds.

This design prevented the concentration of legislative, executive, and judicial authority in a single institution while creating a structure in which the branches would interact and check one another. 

Why Did the Framers Separate Governmental Powers?

Why did the framers believe a separation of powers was necessary?

When arguing for ratification of America’s Constitution, James Madison addressed the constitutional principle of separation of powers in Federalist No. 47 by stating that the accumulation of powers in the hands of the executive, legislative, and judiciary, or various combinations of governmental bodies, is “the very definition of tyranny.”

Not only that, but Thomas Jefferson, in his Notes on the State of Virginia, when discussing governmental structure and separation of powers, reiterated the importance of governmental powers being “divided and balanced among several bodies of magistracy.”

However, these men, among others, did not come to their conclusions separate from the historical experience of the colonies.

Historical Progress of Separation of Powers

From the Magna Carta to the English constitutional tradition of the time, the English gradually refined power distribution among the government. To the framers, the powers of the executive and legislature in England were institutionally intertwined, as the Prime Minister and the parliament actively participated in making laws.

However, English tradition gradually increased protections. For example, during the 18th century, English constitutional development progressively built boundaries around the control of the monarch in judicial affairs, in order to hem in monarchical power.

During the colonial days, a fear of concentrated power grew as some colonists felt the crown and government were overstepping their authority and consolidating power against the colonists through acts such as legislation affecting the colonies, assertions of parliamentary and royal authority, taxes without proper representation of the colonies, and the administration of the imperial government.

What influenced the Founders to include separation of powers?

Philosophers such as Montesquieu and Locke, who both emphasized a deep appreciation for what they perceived as a protection of individual liberty in the English Constitution, were among the intellectual inspirations of vocal founders such as George Washington, Thomas Jefferson, and James Madison. These men emphasized a belief in the importance of a separation of powers.

While Montesquieu’s praise of the English system does not map perfectly onto the modern American concept of separation of powers, his appreciation for the concept remained influential in the thoughts of the founders.

Overall, the Framers drew from a wide range of intellectual and historical influences when structuring America's constitutional republic. Their thinking was shaped not only by philosophers and the governments of other nations, but also by America's own experience with self-government. Earlier American constitutional documents, including the Massachusetts Body of Liberties, the Fundamental Orders of Connecticut, and the state constitutions adopted during and after the Revolution, reflected developing ideas about individual liberty, representative government, and the proper boundaries of governmental power. These documents emerged within a broader intellectual and cultural environment shaped, in part, by the Christian Bible. 

The Framers also had the recent experience of governing under the Articles of Confederation. The Articles had created a national government with limited powers and no separate executive or federal judiciary.

By 1787, many Americans believed the Confederation Congress lacked sufficient authority to address important national problems. The Constitution therefore required the Framers to solve a difficult problem: how to establish a government strong enough to govern effectively while preventing that government from concentrating power in ways that threatened liberty. 

The Three Branches of Government

The first three Articles of the U.S. Constitution establish the three branches of the federal government and define their principal powers and responsibilities. 

• Article I provides the responsibilities of the legislative branch, known as Congress.

• Article II sets up the executive branch, which operates under the direction of the President.

• Article III defines the role and responsibilities of the Judicial branch, known as the courts.

The Legislative Branch

Legislative branch definition: The part of the government responsible for making federal laws. In the United States, this power is vested in Congress, which is split into two parts: the Senate and the House of Representatives.

What is a bicameral legislature?

Article I of the Constitution establishes the legislative branch and consists of Congress. Congress is known as a bicameral legislature, meaning it consists of two chambers. Those two chambers are known as the Senate and the House of Representatives.

The framers chose a two-house system as a compromise over representation and partly as another means of slowing and scrutinizing the exercise of legislative power. Typically, a bill must pass through both chambers before it can be presented to the President.

Under the original Constitution, the Senate was selected by state legislatures and was designed to represent the states within the federal government, while members of the House were elected directly by the people. The Seventeenth Amendment, ratified in 1913, changed the selection of senators by providing for their direct election by the people of each state. 

By dividing the Congress into two chambers with different constituencies and constitutional roles, the founders fashioned an internal restraint on the exercise of legislative power.

What does the Legislative branch do?

The legislative branch oversees the creation of laws. In America, Congress exercises the federal government’s legislative power by proposing, debating, and enacting federal statutes. It can also amend or repeal existing statutes.

Article I also names other responsibilities to the legislative branch. Roles and responsibilities such as:

• Taxation: Determining what taxes will be levied

• Appropriations: “The power of the purse” or authority over the budget and dispensing of funds

• Oversight: Supervision, monitoring, and review of federal agencies, programs, and policy implementations.

• Impeachment: The formal process in which Congress can charge certain government officials for misconduct or serious illegal activity, including treason, bribery, or other high crimes and misdemeanors.

Example of separation of powers: Congress’ responsibility of oversight means Congress can ensure the executive branch follows the law, spends tax funds properly, and that government operates as it should.

The Executive Branch

Executive branch definition: The part of the government that carries out and enforces federal law. It is headed by the President and includes the executive departments, agencies, and other officials responsible for carrying out federal responsibilities.

What are the duties of the executive branch?

Article II places responsibility for executing federal law in the hands of the President. The President also:

• Serves as commander in chief of the U.S. military

• Makes certain appointments with Senate consent

• Conducts foreign affairs within constitutional limits

• Possesses the power to veto legislation passed by Congress

• Granting pardons

The Judicial Branch

Judicial branch definition: The judicial branch is the part of the government responsible for resolving cases and controversies arising under the Constitution, federal laws, treaties, and other matters within federal judicial jurisdiction.

What is the main job of the Judicial Branch?

The judicial branch consists of the Supreme Court and the lower federal courts established under federal law.

Article III vests the federal judicial power in these courts and defines the kinds of cases over which federal courts may exercise jurisdiction.

At its most basic level, the main job of the judicial branch is to decide legal cases and controversies according to the law. Over time, the federal judiciary has also played a central role in interpreting the Constitution, including through the doctrine of judicial review.

Separation of Powers in the Constitution

The Constitution provides distinct institutional responsibilities between the three branches by defining their roles in the three articles:

• Article I - Legislative branch

• Article II - Executive branch

• Article III - Judicial branch

These distinct grants of power establish constitutional boundaries around each branch, while the Constitution also gives the branches specific ways to participate in or restrain the actions of the others. 

In Federalist No. 47, James Madison writes, "The accumulation of all powers, legislative, executive, and judiciary, in the same hands, whether of one, a few, or many, and whether hereditary, self-appointed, or elective, may justly be pronounced the very definition of tyranny.”

Madison's argument was not that government itself was inherently tyrannical. His concern was that concentrating legislative, executive, and judicial authority in the same hands removed the institutional barriers that could restrain the abuse of power. 

However, separation does not mean complete isolation.

The branches are distinct, but they are not sealed off from one another. The Constitution deliberately creates points of interaction between them. Congress passes legislation, the President participates in the legislative process through the veto, the Senate provides advice and consent on certain presidential appointments and treaties, and the federal courts resolve cases arising under federal law and the Constitution. These interactions are not exceptions to the constitutional design; they are part of it. 

Separation of Powers vs. Checks and Balances

Separation of Powers and Checks and Balances are closely related but distinct constitutional principles. Separation of Powers determines where governmental powers are located; Checks and Balances describes the mechanisms through which the branches can restrain or influence one another when exercising those powers.

The Constitution therefore does not create three completely isolated branches. Instead, it creates separate institutions whose powers overlap in carefully defined ways.

Examples of Separation of Powers

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Example 1 — Congress Makes Federal Laws

Congress exercises legislative power vested in it by Article I. Its primary constitutional role is to deliberate and enact federal laws that the federal government will operate by, enforce, and uphold.

Example 2 — President Executes Laws

The President administers and enforces federal law. The President and the executive branch are tasked with taking all laws passed by Congress and signed by the President and enforcing those laws by upholding the laws, ensuring both government and citizens follow those laws, and investigating, prosecuting, and carrying out punishments when laws are broken.

Example 3 — Federal Courts Exercise Judicial Power

Federal courts exercise judicial power. Courts resolve cases and controversies falling within their constitutional and statutory jurisdiction.

Courts also pass opinions on the constitutionality of laws passed by Congress or the states.

These Powers Also Intersect

The separation of powers does not mean that each branch operates in isolation. The Constitution’s distribution of powers allows each branch to participate in the action of government, while having certain levers to restrain the actions taken by another branch. These examples that follow are of checks and balances, which work alongside separation of powers.

Example 4 — Presidential Veto

The President can reject legislation passed by Congress. While this is a separation of powers, it is also a check and balance to ensure that laws passed by Congress are not on the whims of the legislature alone, but approved by the executive branch - the branch tasked with enforcement of such laws.

Example 5 — Senate Confirmation

The President nominates certain officials, while the Senate provides advice and consent. This offers the Senate the opportunity to determine who will be tasked with certain responsibilities within the government.

Example 6 — Impeachment

The House impeaches, which then calls on the Senate to bring the impeachment to trial. The Senate conducts a trial to determine whether to convict. Conviction requires the concurrence of two-thirds of the senators present. This two-step process ensures that Congress, as a single body, cannot punish a government official through a simple majority vote.

Example 7 — Judicial Review

Courts can determine whether governmental actions conform to the Constitution.

How Each Branch Checks the Others

Each branch participates in a system of checks and balances that allows the branches to restrain one another and helps maintain constitutional boundaries around the exercise of governmental power.

How Does Congress Check the President?

Congress checks the President in the following ways:

• Legislation: Congress establishes the laws that govern the exercise of executive authority

• Appropriations: Congress controls federal spending through the power of the purse

• Veto override: Congress has the ability to override a presidential veto with a two-thirds vote

• Impeachment: The House may impeach, and the Senate may convict and remove an official.

• Senate confirmation: The Senate must confirm nominated officials.

• Treaty approval: The Senate must consent to treaties by a two-thirds vote of senators present.

How Does the President Check Congress?

The President can check Congress by the following responsibilities:

• Veto

• Returning legislation to Congress with objections

• Executive enforcements/administration of federal law, within constitutional limits

How Does Congress Check the Judiciary?

How does the legislative branch check the judicial branch?

• Senate confirmation of federal judges

• Impeachment and removal

• Authority over lower federal courts

• Regulation of federal jurisdiction and defining the jurisdiction of lower federal courts, subject to constitutional limitations.

How Does the Judiciary Check the Other Branches?

Over time, the Supreme Court developed four main doctrines to enforce the “cases and controversies” power provided within the Constitution, which makes up the main role of the judiciary's responsibilities.

However, in Marbury v. Madison (1803), the Supreme Court asserted the authority of the judiciary to determine whether an act of Congress was consistent with the Constitution. This decision became a foundational statement of the doctrine of judicial review - a responsibility of the judiciary to determine the constitutionality of laws.

Federal courts also rely on precedent when deciding cases. Prior judicial decisions can therefore influence how later courts interpret and apply constitutional provisions and laws. In this sense, precedent has become an important supplement to the process of constitutional interpretation, even as debates continue over the proper role of original meaning, text, precedent, and other interpretive principles in determining constitutional questions. 

What Stops One Branch of Government From Becoming Too Powerful?

The Constitution does not rely on a single safeguard to prevent one branch from becoming too powerful. Instead, it uses several overlapping mechanisms. Those include:

Separation of powers: Divides the responsibilities and powers of the three branches of government

Checks and balances: Constitutional powers given to each branch of government that can limit or restrain the exercise of power by the other branches.

Federalism: A vertical division of authority between the federal government and the states. The states constitutionally retain significant powers that prevent all governmental authority from being centralized at the national level.

Elections: Elected officials may be voted in or out of office by the population, providing incentive to uphold constitutional responsibilities.

Limited governmental powers: The Constitution limits governmental power by defining and restricting the powers that the federal government may exercise.

Judicial review: Allows courts, in cases properly before them, to determine whether governmental actions are consistent with the Constitution, providing an important check against unconstitutional exercises of power. 

Constitutional rights: Establish protections that limit what the government may lawfully do to individuals, regardless of which branch is exercising governmental power. 

Why Separation of Powers Matters

Separation of Powers helps prevent a dangerous concentration of authority in the “hands” of a single branch and encourages accountability between the branches.

Not only does Separation of Powers divide responsibilities among the branches, but it also creates a system that requires cooperation between them. When governmental action requires the participation or approval of multiple institutions, decisions can be slowed by design, making sudden or unilateral exercises of power more difficult.

However, this also means that a constitutional government operating according to Separation of Powers and Checks and Balances will sometimes produce conflict. That conflict can create tension between the branches and slow the pursuit of particular objectives.

Conflict between the branches does not necessarily mean that the constitutional system is failing. In some circumstances, institutional conflict is evidence that the system's competing powers and constitutional restraints are operating as designed.

Common Misconceptions About Separation of Powers

Misconception 1:

"The branches are completely independent."

No. They are distinct but interconnected.

Misconception 2:

"Separation of Powers means each branch only performs one function."

Not quite. The Constitution gives branches primary responsibilities but also provides overlapping checks.

Misconception 3:

"Checks and Balances and Separation of Powers mean the same thing."

No. Explain the distinction.

Misconception 4:

"The President is part of the legislative process."

The President doesn't legislate in the constitutional sense, but the veto gives the executive a role in the legislative process.

Misconception 5:

"Judicial Review is explicitly written into Article III."

No. This allows us to reinforce the distinction established in the pillar article.

FAQs on Separation of Powers

1. What is the difference between separation of powers and checks and balances?

   Separation of Powers divides governmental powers among the legislative, executive, and judicial branches. Checks and Balances refers to the constitutional mechanisms that allow those branches to restrain or influence one another while exercising their respective powers. The branches are therefore distinct but not completely isolated.

   
   

2. How does the legislative branch check the judicial branch?

   The legislative branch can check the judiciary through several constitutional powers. The Senate participates in the confirmation of federal judges, Congress has authority over the establishment and organization of lower federal courts, and the House and Senate participate in the impeachment and removal process for federal judges. Congress also has authority to regulate federal jurisdiction within constitutional limits.

   
   

3. What stops one branch of government from becoming too powerful?

   The Constitution uses several overlapping safeguards, including Separation of Powers, Checks and Balances, Federalism, elections, limited governmental powers, Judicial Review, and constitutional rights. Together, these mechanisms divide governmental authority and establish boundaries on how that authority can be exercised.

   
   

4. How does Federalism differ from Separation of Powers?

   Separation of Powers divides authority among the three branches of the federal government. Federalism divides governmental authority vertically between the federal government and the states. Separation of Powers therefore addresses the distribution of power within the federal government, while Federalism addresses the distribution of power between different levels of government.

Primary Sources: Separation of Powers

• U.S. Constitution, Articles I–III

• Federalist No. 47

• Federalist No. 51

• Madison's Convention Notes

• Montesquieu, The Spirit of the Laws

• relevant Anti-Federalist writings