The Constitution

By the end of this lesson, students will be able to:

• Describe the structure of the legislative, executive, and judicial branches as established in Articles I, II, and III, and identify the distinct powers each article assigns.
• Explain how separation of powers and checks and balances operate together, citing specific clauses such as the presidential veto, the congressional override, the impeachment power, and Senate confirmation of treaties and appointments.
• Define federalism and trace how the Constitution divides authority between the national government and the states, including the role of the Article VI supremacy clause.
• Identify the protections established by the Bill of Rights and account for why Antifederalists insisted on those amendments as a condition of ratification.
• Explain the Article V amendment process and the political logic behind requiring a supermajority for both proposal and ratification.
• Account for the constitutional compromises over slavery, including the three-fifths clause, the fugitive slave clause, and the twenty-year protection of the international slave trade.

The Constitution is short. The full text, including all twenty-seven amendments, runs to roughly 7,500 words. What it lacks in length it makes up for in structural ambition. Inside that compact document the framers stood up an entire federal government, divided its power among three branches, drew a working boundary between national and state authority, and described the procedure by which the document itself could be revised. Lesson 8 covered the bargaining that produced the text. This lesson reads the text as architecture (KC-3.2.II.C.ii).

Article I establishes the legislative branch and gives it pride of place by length and detail. Section 1 vests "all legislative powers" in a Congress of two chambers. The House of Representatives is apportioned among the states by population, with members serving two-year terms; the Senate seats two members from each state regardless of size, with six-year terms staggered so that one-third of seats are contested every two years. Section 8 lists the enumerated powers: the authority to lay and collect taxes, borrow on the credit of the United States, regulate interstate and foreign commerce, coin money, establish post offices, raise armies and navies, and declare war. Section 8 closes with the necessary and proper clause, which authorizes Congress to make all laws "necessary and proper" for carrying its enumerated powers into effect, the textual hook on which Hamilton and later Federalists built the case for a national bank and on which every later expansion of federal authority has rested (KC-3.2.II.C.ii).

Article II creates the executive branch and is notably terse compared with Article I. Section 1 vests "the executive power" in a President of the United States, sets a four-year term, requires that the office-holder be a natural-born citizen at least thirty-five years of age, and lays out the electoral college as the mechanism for selecting the President. The framers wanted neither a directly elected demagogue nor a chief executive chosen by Congress alone; the electoral college was the compromise between those concerns. Section 2 names the President commander-in-chief of the armed forces, gives the office the power to grant pardons and reprieves, and conditions the treaty-making power and the power to nominate judges and ambassadors on the advice and consent of the Senate. Section 3 obliges the President to deliver a State of the Union message and to take care that the laws are faithfully executed. Section 4 establishes the impeachment standard: treason, bribery, or other high crimes and misdemeanors.

Article III is shorter still. It vests the judicial power in "one supreme Court, and in such inferior Courts as the Congress may from time to time ordain and establish." This wording is consequential. The Constitution itself sets up only the Supreme Court; every other federal court exists because Congress chose to create it through the Judiciary Act of 1789. Article III sets the jurisdiction of the federal courts, guarantees jury trial in federal criminal cases, and defines treason narrowly to prevent the kind of political prosecutions that English Crown courts had used to silence dissent. The article does not explicitly grant the courts the power of judicial review; the Supreme Court would assert that authority in Marbury v. Madison in 1803, an argument Hamilton had foreshadowed in Federalist No. 78.

Three branches with distinct powers would not, on their own, prevent any one branch from absorbing the others. The framers wove a second structural principle through the document to keep the branches in check. The separation of powers assigns each branch a different function. Checks and balances let each branch reach into the work of the others. The President can veto legislation; Congress can override a veto by a two-thirds vote in both chambers. The Senate must confirm federal judges, ambassadors, cabinet officers, and treaties. The House holds the sole power of impeachment; the Senate tries impeachments. The judicial branch interprets statutes and, after 1803, may strike them down when they conflict with the Constitution. Madison defended this layered design in Federalist No. 51, arguing that ambition would have to be made to counteract ambition because human nature could not be relied on to keep itself in line (KC-3.2.II.C.ii).

A second structural axis runs perpendicular to the three branches. Federalism divides political authority between the national government and the state governments. The Constitution lists what the national government may do; everything not listed (and not specifically forbidden to the states) remains with the states. The Article VI supremacy clause resolves the inevitable conflicts: the Constitution, federal statutes, and federal treaties are "the supreme Law of the Land," and state judges are bound to follow them when state law conflicts. Federalism turned out to be the document's most contested feature, and the boundary between federal and state authority has been redrawn repeatedly by Supreme Court decisions, by constitutional amendments, and by the political branches themselves (KC-3.2.II.C.ii).

Antifederalists complained during the ratification fight that the proposed Constitution lacked an explicit list of protected rights. Federalists won ratification only by promising to add such a list, and the First Congress made good on that promise. Madison drafted twelve amendments; ten were ratified by the states in 1791 and became the Bill of Rights. The First Amendment protects freedom of religion, speech, the press, assembly, and petition. The Second protects the right to keep and bear arms. The Fourth bars unreasonable searches and seizures and requires warrants supported by probable cause. The Fifth establishes the rights to grand jury indictment, protection against double jeopardy and self-incrimination, and the requirement of due process and just compensation when government takes private property. The Sixth and Seventh guarantee jury trial and other procedural protections in criminal and civil cases. The Eighth bars cruel and unusual punishments. The Ninth clarifies that the listed rights are not exhaustive. The Tenth reserves to the states or to the people every power the Constitution does not delegate to the national government (KC-3.2.II.E).

The framers also described how the document could be changed. Article V sets a deliberately demanding two-step amendment process. An amendment may be proposed by a two-thirds vote of both chambers of Congress or by a convention called at the request of two-thirds of the state legislatures. A proposed amendment becomes part of the Constitution only when it is ratified by three-fourths of the states, either by their legislatures or by state ratifying conventions. The supermajority threshold is high enough that only twenty-seven amendments have been added in more than two centuries. The mechanism is what made the Constitution a living instrument rather than a dead letter: the Bill of Rights, the Reconstruction Amendments, the Nineteenth Amendment, and the rest of the document's expansions of liberty all moved through this same channel.

The Constitution did not, in 1787, extend its protections to everyone living within American borders. The same document that limited federal power and protected speech also preserved racial slavery in three structural ways. The three-fifths clause in Article I, Section 2 counted three out of every five enslaved persons toward each state's population for purposes of House apportionment and direct taxation, magnifying the political weight of the slave states without giving the enslaved any voice. Article I, Section 9 forbade Congress from prohibiting the international slave trade for twenty years, until 1808. The fugitive slave clause in Article IV required free states to return persons "held to service or labor" in another state, binding the entire union to slavery's enforcement. The framers debated these provisions; James Madison recorded that some delegates objected on moral grounds. They adopted them anyway because the slave-state delegations would not ratify a charter that did not include them (KC-3.2.II.D). Period 3 closes with the United States as a constitutional republic and as a slaveholding republic at the same time, and the contradiction would shape every later period in this course.

Reading the Constitution as architecture means reading the text alongside the framers' own structural arguments. The four excerpts below pair the document with the Federalist defense of its central design choices.

1. (Continuity and Change) Compare the Articles of Confederation with the federal Constitution. Identify two specific structural problems under the Articles that the Constitution attempts to solve, and assess whether the solutions worked.
2. (Causation) Article I runs to roughly half the length of the entire original Constitution; Article II is much shorter; Article III is shorter still. Account for that difference. What does the proportion suggest about the framers' expectations for each branch?
3. (Comparison) Compare Madison's argument in Federalist No. 51 with Hamilton's argument in Federalist No. 78. Both essays defend the Constitution as a structure that limits power. Identify one substantive disagreement between them about how that limiting actually works.
4. (Continuity and Change) The Bill of Rights was added in 1791. Identify two ways in which the protections in those ten amendments respond to grievances colonists had voiced under British rule before 1776. Identify one protection that does not have a clear pre-Revolutionary parallel.
5. (Comparison) The three-fifths clause, the fugitive slave clause, and the twenty-year protection of the slave trade were all built into the document. Account for why the framers accepted those clauses in 1787, and assess the long-term consequences for the constitutional system Period 3 produced.

Draft alignment — pending educator review. AP USH codes correspond to the official College Board Course and Exam Description (Effective Fall 2023, Version 1). Statements below are paraphrased in the CountryReports voice; refer to the College Board's published CED for verbatim wording.