US Constitution
Why it Matters
Every serious argument about government power lands in the same place: the Constitution. It builds the government and then fences it in, splitting power among the branches, splitting it again between the nation and the states, and stopping it altogether at an individual’s rights. So when a lawyer attacks a statute, challenges an agency action, or defends a client’s rights, the question underneath is the same: does the Constitution permit what the government did? Answering it means finding the opinion that decided the point, locating the sentence the result turns on, and reading that sentence yourself. Do that and you can follow a constitutional argument instead of taking someone’s summary on faith.
Current Context
On February 20, 2026, the Supreme Court held in Learning Resources, Inc. v. Trump that the International Emergency Economic Powers Act does not authorize the President to impose tariffs (opens in a new tab). The trafficking and reciprocal tariffs issued under it fell with that ruling. Finding the holding takes work, because Chief Justice Roberts announced the judgment while only parts of his opinion commanded a majority, and six justices wrote separately (opens in a new tab). The majority’s reasoning is narrow: the statute’s list of presidential powers never mentions tariffs or duties, and the government could name no statute where a power to regulate included a power to tax. A summary can tell you the Court struck down the tariffs, and only the opinion tells you which sentences six justices signed.
Key Concepts
Constitution
The supreme law that establishes the structure, limits, and authority of government in the United States. It is short by design, closer to an outline than a detailed code, which is why so much constitutional meaning gets worked out one case at a time in the Supreme Court.
Separation of Powers
The division of the federal government into legislative, executive, and judicial branches, each with its own function and its own checks on the others. The hardest modern cases rarely involve a naked grab of power. They ask where one branch’s authority ends, especially once Congress hands rulemaking to an administrative agency.
Federalism
The division of authority between the national government and the states. The Constitution lists the federal government’s powers and leaves the rest to the states. Congress and the states fight over where that line falls, subject by subject, from commerce to public health.
Supremacy Clause
The provision in Article VI making the Constitution and valid federal law superior to conflicting state law. When a state rule collides with a constitutional federal one, the state rule yields.
Judicial Review
The power of a court to measure a law or a government action against the Constitution and refuse to enforce it if the two conflict. The Supreme Court claimed this power in 1803, and it is what makes the Constitution’s other limits binding instead of advisory.
Fundamental Rights
Liberties either named in the Bill of Rights or so deeply rooted in the nation’s history and tradition that they are implicit in the concept of ordered liberty. Courts give them the strongest protection, under the Due Process and Equal Protection Clauses. Deciding what counts as fundamental drives some of the Court’s most divided decisions.
Case Brief
A short, structured summary of a judicial opinion capturing its facts, the legal issue, the holding, and the Court’s reasoning. Briefing forces you to separate what the Court actually decided from the background and the rhetoric around it.
Holding
The specific legal rule a court adopts to resolve the dispute in front of it, as distinct from broader commentary the decision did not require. Pin the holding down precisely and you can predict how the case applies to the next set of facts.
Resources
- The U.S. Constitution (full text) (opens in a new tab) (The primary source itself; read the article or amendment your case interprets before you read anything written about it.)
- Constitution Annotated (opens in a new tab) (The Library of Congress’s clause-by-clause analysis of how the Supreme Court has read each provision; use it to place a case inside its doctrine.)
- Oyez (opens in a new tab) (Free case summaries, facts, holdings, and oral-argument audio for cases from 1955 forward, maintained by Chicago-Kent and Cornell LII; your starting point for the breadth scan.)
- Google Scholar (opens in a new tab) (Where you pull the majority opinion itself and check a quote word for word against the text.)
- Cornell Legal Information Institute, Supreme Court Collection (opens in a new tab) (Full opinion text with linked cross-references, and a reliable second database when you verify a quote twice.)
- Marbury v. Madison, 5 U.S. (1 Cranch) 137 (1803), National Archives (opens in a new tab) (The founding judicial-review decision with document images and historical context, a worked example of how to read an old opinion.)
What to Do
This activity hands you a method you can run on any constitutional case. Scan broadly to build a map, brief a few cases closely, read one opinion in full, and check what you were told against the text. You will not master all of the cases below, and you are not meant to. You will leave with a process that works on any case you meet for the rest of the course.
Part 1: Build the Map
Start wide. Choose at least ten cases from the four groups below, two or three from each, so you see the Constitution working across different kinds of problems. Run the Case Scanner prompt on each one for a short summary, then open the matching Oyez page and confirm the AI got the facts and the holding right. Orientation is the goal here, not depth. By the end you should be able to say in one sentence what each case is about and which constitutional function it touches.
Judicial review and supremacy: Marbury v. Madison (1803), McCulloch v. Maryland (1819), United States v. Nixon (1974), West Virginia v. EPA (2022).
Separation of powers and the administrative state: Youngstown Sheet & Tube Co. v. Sawyer (1952), INS v. Chadha (1983), Seila Law LLC v. CFPB (2020), Loper Bright Enterprises v. Raimondo (2024), SEC v. Jarkesy (2024).
Federalism and the Commerce Clause: Gibbons v. Ogden (1824), Wickard v. Filburn (1942), United States v. Lopez (1995), Printz v. United States (1997), NFIB v. Sebelius (2012), Murphy v. NCAA (2018).
Individual rights: Brown v. Board of Education (1954), Gideon v. Wainwright (1963), Tinker v. Des Moines (1969), Obergefell v. Hodges (2015), Dobbs v. Jackson Women’s Health Organization (2022), 303 Creative LLC v. Elenis (2023), Students for Fair Admissions v. Harvard (2023), United States v. Rahimi (2024).
Part 2: Brief Four Cases
Now narrow. Pick one case from each of the four groups, four in total, choosing the ones that held your interest during the scan. Write a short brief for each, following the structure in Key Concepts: facts, issue, holding, and reasoning. Use the Brief Builder prompt to draft them, and treat what comes back as a first pass you will correct rather than a finished product. In each brief, name the constitutional function at work and, where it fits, the branch’s power or the individual right in dispute and the clause that supplies it. The Constitution Annotated is your tool for locating that clause. Then take two briefs that share a function and run the Doctrine Connector prompt on them. Do the two cases push the same way, or does the later one narrow the earlier one?
Part 3: Read One Opinion in Full
From your four briefs, choose the case you found most compelling. Find the full majority opinion on Google Scholar or Cornell LII and read it. You will not understand every term, and that is fine. Read for the shape of the argument: how the Justice frames the question, what the Court relies on, and how it gets from the facts to the holding. Watch for the places where the opinion’s own words differ from the tidy summary you read in Part 1.
Part 4: Verify the Load-Bearing Quote
Return to the case you just read. Run the Quote Locator prompt to get the single sentence the AI claims captures the heart of the opinion, along with the name of the Justice who wrote it. Then play detective. Open the full opinion, search for the quote with Ctrl+F or Cmd+F, and confirm that it appears word for word. Read the paragraph before it and the paragraph after it, and ask whether that context changes what the quote means. Check the AI’s claim about which Justice wrote it against the opinion’s caption, because a sentence from a concurrence or a dissent is not the Court speaking. If the quote is misattributed, paraphrased, or pulled out of context in a way that distorts it, write down exactly what was wrong. This is the habit that separates lawyers who use AI well from those who get sanctioned for citing cases that say something other than what they were told.
Part 5: Write Your Reflection
In a post of 400 to 600 words, reflect on the method rather than summarizing the cases. Start with what surprised you most when you moved from the AI summaries to the text of the opinion. Then take up the verification step in Part 4: did checking the quote and reading its context change your understanding of the case, and what is your one specific example? Close by naming the constitutional function that now seems most complex or most important to you, and explain why.
Part 6: Share Chat Link
Include one AI chat link with a 1–2 sentence explanation of what the conversation shows and why you chose to share it.
Suggested AI Prompts
Use these prompts as a starting point, then adjust them to fit your goal. Strong prompting develops through trial, revision, and testing. It’s a foundational skill that grows into more advanced AI work such as context engineering and agent-based workflows.
Case Scanner
You are helping a college student in an Introduction to Law course build a quick mental map of constitutional cases. Ask me to name one U.S. Supreme Court case. Once I give it to you, write a tight summary of no more than 150 words covering the key facts, the constitutional question, the Court’s holding, and why the case matters. Then state in one sentence which of the Constitution’s core functions the case touches: structuring government through separation of powers or federalism, asserting the supremacy of federal law and the Constitution, or protecting individual rights. If the case turns on judicial review, say so. Keep the language plain and do not pad it.
Role and context setting tell the model who is reading, and the 150-word cap tells it how much room it gets. Both matter for a breadth scan: without the cap you get ten essays of uneven depth, and comparing them costs more time than the scan was meant to save.
Brief Builder
You are an experienced legal writing instructor. Ask me to name one U.S. Supreme Court constitutional case. After I respond, produce a case brief using exactly these four labeled sections: Facts, Issue, Holding, Reasoning. In the Holding section, state the precise legal rule the Court adopted and keep it separate from any broader commentary in the opinion. In a final line labeled “Constitutional function,” identify which function the case illustrates and, if relevant, which branch’s power or which individual right is at stake and where in the Constitution that authority is located. Write in full sentences within each section.
Naming the four sections and their order is structured output, and it brings four different cases back in one shape you can compare. It also exposes gaps, because a thin Reasoning section is your signal to go read the opinion yourself.
Quote Locator
You are helping me read a Supreme Court opinion closely. Ask me to name the case. Once I do, tell me which Justice wrote the majority opinion, then give me the single sentence from that opinion you believe best captures its core constitutional significance, quoted exactly as it appears in the decision. Below the quote, explain in two or three sentences why that sentence matters for constitutional structure, supremacy, or rights. Flag clearly if you are uncertain whether the wording or the authorship is exact, and tell me you may be wrong and that I should verify the quote against the full opinion before relying on it.
This prompt builds verification into the task by making the model surface its own uncertainty and send you back to the source. Models invent and misattribute quotes with complete confidence, so naming that failure mode inside the prompt is what keeps the citation honest.
Doctrine Connector
You are a constitutional law tutor. I will give you two cases I have already briefed. Without re-summarizing them, explain how they relate to each other doctrinally: do they apply the same constitutional function, push in the same or opposite directions, or refine or limit one another over time? Then ask me one question that tests whether I can apply the rule from the more recent case to a new hypothetical. Wait for my answer before telling me whether I am right.
This is Socratic elicitation: the model closes by asking you a question and withholding the answer until you try. A model that tests your reasoning is a study partner, and one that hands you the conclusion is an answer key, which is the difference between learning a doctrine and renting it.