Understand the document that creates, limits, and organizes the federal government.
The Constitution explains what the federal government may do, how power is divided among the three branches, how states fit into the system, and which rights the government must respect. This section gives visitors a plain-English path through the articles, amendments, founding debates, and constitutional principles that still shape public life.
“The Constitution is the guide which I never will abandon.”
Founding Text
The Seven ArticlesHow the original Constitution organizes the federal government.The PreambleWhy the Constitution begins with “We the People.”Founding ContextThe Articles of Confederation, convention, and ratification debates.Constitutional PrinciplesLimited government, federalism, checks, and separated powers.
Rights
Bill of RightsThe first ten amendments explained in plain language.Later AmendmentsVoting, citizenship, income tax, succession, and term limits.Due ProcessHow the Constitution protects life, liberty, and property.Equal ProtectionWhat the 14th Amendment means in everyday disputes.
Power
Separation of PowersHow Congress, the President, and courts divide authority.Checks and BalancesHow each branch can slow, limit, or challenge the others.FederalismWhat belongs to Washington, the states, or both together.Supremacy ClauseWhy valid federal law can override conflicting state law.
History & Change
How Amendments WorkThe difficult process for changing the Constitution.Constitutional MomentsEvents and cases that changed how the Constitution works.Landmark CasesSupreme Court decisions that reshaped constitutional meaning.InterpretationHow judges, officials, and citizens argue about the text.
Founding Document
We the People
The Preamble states the Constitution’s purpose: to create a stronger union, establish justice, preserve peace, provide defense, promote general welfare, and secure liberty for future generations.
The seven articles
The original Constitution is organized into seven articles. Each article handles a core part of the federal structure: Congress, the presidency, the courts, the states, the amendment process, supremacy of federal law, and ratification.
The Legislature
Creates Congress and gives it authority over lawmaking, taxes, spending, commerce, war, and the structure of the federal government.
The Executive
Creates the presidency, sets the basic rules for elections, and gives the President executive power, appointment authority, and commander-in-chief duties.
The Judiciary
Creates the Supreme Court, allows Congress to create lower federal courts, and protects judicial independence through life tenure.
The States
Explains how states relate to one another, how new states may be admitted, and what the federal government guarantees to each state.
The Amendment Process
Creates the formal process for changing the Constitution through proposal and ratification by supermajorities.
Supremacy and Ratification
Makes the Constitution supreme law, bans religious tests for office, and sets the rules that brought the Constitution into effect.
Amendments I–X
The Bill of Rights
The first ten amendments protect speech, religion, press, assembly, petition, criminal procedure, property, privacy, jury rights, and powers reserved to the states and the people.
Later amendments
The amendments after the Bill of Rights changed the country in major ways: ending slavery, defining citizenship, expanding voting rights, authorizing income tax, limiting presidential terms, and clarifying succession.
13th, 14th, and 15th Amendments
Abolished slavery, established birthright citizenship and equal protection, and prohibited racial discrimination in voting.
Voting Amendments
Expanded voting access by sex, race, age, and the abolition of poll taxes in federal elections.
Terms and Succession
Limited presidents to two elected terms and clarified what happens when a president dies, resigns, or cannot serve.
How the Constitution is amended
The Constitution can change, but only when support is broad and durable. Every successful amendment so far has been proposed by Congress and ratified by the states.
Proposal begins
An amendment starts as a joint resolution in Congress or through a convention requested by the states.
Two-thirds approval
The House and Senate must each approve the proposal by a two-thirds vote. The President has no veto.
States decide
The proposal goes to state legislatures or state conventions, depending on the method Congress selects.
Three-fourths ratify
Thirty-eight states must approve before the amendment becomes part of the Constitution.
Constitutional principles
The Constitution is more than a list of rules. It establishes a system built around recurring ideas that help explain why the federal government is powerful in some areas and limited in others.
Popular Sovereignty
Government gets its authority from the people, not from kings, inherited status, or permanent rulers.
Separation of Powers
Legislative, executive, and judicial powers are divided so no single branch can control the whole system.
Checks and Balances
Each branch has tools to limit the others, creating friction that protects against abuse.
Shared Sovereignty
Power is divided between the national government and the states, with both levels exercising authority.
Supremacy
The Constitution, valid federal laws, and treaties are supreme over conflicting state laws.
Individual Liberty
The amendments limit what government may do to people, even when officials claim public necessity.
“A constitution is not the act of a government, but of a people constituting a government.”
Constitutional moments
The meaning of the Constitution has been shaped by ratification debates, amendments, court decisions, national crises, and the long effort to apply rights more fully.
Ratification
Nine states approve the Constitution, bringing the new federal government into existence.
Bill of Rights
The first ten amendments are ratified after several states demand clearer limits on federal power.
Judicial review
Marbury v. Madison helps establish the Supreme Court’s role in deciding what the Constitution means.
Reconstruction Amendments
The 13th, 14th, and 15th Amendments transform constitutional law after the Civil War.
Founding context
The Constitution replaced the Articles of Confederation after the first national government proved too weak to tax, regulate commerce, or respond effectively to crises. The new Constitution created a stronger national government while preserving a major role for states.
Why the Articles failed
Congress could request money from states but could not reliably raise revenue or enforce national decisions.
The ratification debate
Federalists argued the new government needed enough power to function. Federalists were critics of the proposed Constitution who feared consolidated national power and demanded stronger protections for liberty.">Anti-Federalists warned that liberty needed stronger protections.
Constitution glossary
Enumerated Powers
Powers specifically listed in the Constitution, especially Congress’s powers in Article I.
Supremacy Clause
The rule that valid federal law overrides conflicting state law.
Due Process
A guarantee that government must follow fair procedures before taking life, liberty, or property.
Judicial Review
The power of courts to decide whether laws or government actions violate the Constitution.
How to use this page
Use The Constitution without getting lost.
Read the Constitution as a working structure: institutions, powers, procedures, rights, amendments, and limits on public authority.
Official starting points
Use these sources to check current text, records, deadlines, forms, votes, rules, or public notices.
Quick Link Guide
One-click access to other sections of the government education guide.
Guide To Government
Start with branches, powers, checks, records, and practical resources.
Congress
Lawmaking, representation, committees, and oversight.
Executive Branch
Presidency, agencies, and presidential actions.
Judicial Branch
Courts, cases, and court resources.
Federal Budget
Revenue, spending, deficits, debt, and shutdowns.
Elections
Voting, participation, and official election resources.
Government Resources
Official public service and self-help resources.
Glossary
Definitions, tooltips, and related pages.