Constitutional Law is the 1L course that feels least like a course and most like a debate. There are fewer bright-line rules than in Torts or Contracts, more doctrine that shifts with the composition of the Court, and a professor who cares as much about how you reason as what you conclude. But it is far more learnable — and far more exam-predictable — than it first appears, because the whole subject runs on a small number of repeated moves: identify the government actor, identify the power or the right, pick the standard of review, and apply it. This outline maps the entire course in teaching order, gives you the outline-ready rules for each topic, and shows you exactly how Con Law gets tested.

What is Constitutional Law about, and how is it tested?

Constitutional Law is the study of the powers and limits the U.S. Constitution places on government. In the typical 1L survey course it divides cleanly into two halves. The first half is structure: who gets to do what — the power of the federal courts (judicial review), the power of Congress, the power of the President, and the allocation of power between the federal government and the states (federalism). The second half is individual rights: the constraints the Constitution — chiefly the Fourteenth Amendment — places on government action against individuals, primarily due process and equal protection.

On the exam, Con Law is almost always tested through issue-spotters: a hypothetical statute, executive action, or state law, followed by "discuss the constitutional issues" or "advise a challenger." The exam rewards a disciplined framework. For any government action you should ask, in order: Is there a threshold justiciability problem? Which branch or level of government acted, and did it have the power? Which individual right, if any, is burdened? What level of scrutiny applies? Does the action survive that scrutiny? Master that sequence and you have the spine of every Con Law answer.

The doctrinal map: what you'll cover, in order

Most courses proceed roughly as follows. Use this as the skeleton of your own outline.

1. Judicial power and judicial review — Marbury, the source and limits of the Court's authority, justiciability.
2. Congressional power — the enumerated powers, especially the Commerce Clause, the Taxing and Spending Power, and Section 5 of the Fourteenth Amendment.
3. Federalism and limits on state power — the Tenth Amendment, the Dormant Commerce Clause, preemption.
4. Separation of powers — executive vs. legislative power, delegation, appointment and removal, executive privilege and immunity.
5. The state action doctrine — the gateway to individual-rights claims.
6. Due process — procedural due process and substantive due process (including the fundamental-rights privacy line of cases).
7. Equal protection — the tiers of scrutiny by classification.
8. (Often) First Amendment — speech and religion, sometimes taught in a separate course.

Judicial review and justiciability

The course opens with Marbury v. Madison (1803), in which the Supreme Court, per Chief Justice Marshall, held that it is "emphatically the province and duty of the judicial department to say what the law is" — establishing judicial review, the power of federal courts to strike down laws and executive acts that violate the Constitution. This is the foundation of the entire subject; without it, none of the rest is enforceable by courts.

Before a court reaches the merits of any constitutional claim, it must confirm the case is justiciable. These threshold doctrines are prime exam issue-spotters because they are easy to miss:

• Standing — the plaintiff must show (1) an injury in fact that is concrete and particularized, (2) causation traceable to the defendant, and (3) redressability by a favorable ruling.
• Ripeness — the harm must not be too speculative or premature.
• Mootness — a live controversy must persist through litigation (with exceptions for issues "capable of repetition yet evading review" and voluntary cessation).
• Political question — courts will not decide issues textually committed to another branch or lacking judicially manageable standards.

Exam tip: when a fact pattern gives you a plaintiff who hasn't yet been harmed, or a party challenging a law that doesn't apply to them, standing or ripeness is the hidden first issue. Address it before you spend a paragraph on the merits.

Congressional power: the Commerce Clause and friends

Because Congress has only enumerated powers, every federal statute on your exam needs a constitutional hook. The three you must know cold:

The Commerce Clause. Congress may regulate three categories: (1) the channels of interstate commerce, (2) the instrumentalities of interstate commerce and persons or things in interstate commerce, and (3) activities that substantially affect interstate commerce. The third category is where the action is. Under Wickard v. Filburn (1942), Congress may regulate purely local economic activity if, in the aggregate, it substantially affects interstate commerce. But United States v. Lopez (1995) and United States v. Morrison (2000) drew a line: Congress cannot use the Commerce Clause to reach non-economic activity (gun possession near schools; gender-motivated violence) on an aggregation theory. And NFIB v. Sebelius (2012) held Congress cannot compel individuals to enter commerce (the individual mandate could not be sustained under the Commerce Clause, though it survived as a tax).

The Taxing and Spending Power. Congress may tax and spend for the general welfare. It can attach conditions to federal funds if the conditions (1) serve the general welfare, (2) are unambiguous, (3) relate to the federal interest in the program, and (4) are not unconstitutional — and, per NFIB, are not so coercive as to amount to "a gun to the head" (as with the threatened loss of all Medicaid funding).

Section 5 of the Fourteenth Amendment. Congress may enforce the Fourteenth Amendment, but under City of Boerne v. Flores (1997) its enforcement legislation must be "congruent and proportional" to an identified constitutional violation — Congress cannot use Section 5 to create new rights.

Exam trap: students reflexively say "Commerce Clause" and stop. The graded answer analyzes whether the regulated activity is economic, whether aggregation applies, and whether Lopez/Morrison cuts against it — and then considers the Taxing/Spending Power as a backup hook.

Federalism: limits on state power

The flip side of federal power is the constraint on states. Two doctrines dominate:

The Dormant Commerce Clause. Even when Congress hasn't acted, the Commerce Clause implicitly limits state laws that burden interstate commerce. Analyze in two steps: (1) Does the state law discriminate against out-of-state commerce, facially or in effect? If yes, it is nearly per se invalid unless the state proves it is necessary to serve a legitimate local purpose with no reasonable non-discriminatory alternative. (2) If the law is non-discriminatory but burdens commerce, apply the Pike v. Bruce Church balancing test — the burden on interstate commerce must not be clearly excessive relative to the local benefits. Note the market-participant exception: when a state acts as a buyer or seller rather than a regulator, the Dormant Commerce Clause doesn't apply.

Preemption. Under the Supremacy Clause, federal law preempts conflicting state law. Preemption can be express, or implied through field preemption (federal regulation so pervasive it occupies the field) or conflict preemption (compliance with both is impossible, or state law obstructs federal objectives).

Separation of powers

This unit tests the boundary between Congress and the President. The organizing framework is Justice Jackson's concurrence in Youngstown Sheet & Tube Co. v. Sawyer (1952): presidential power is at its maximum when the President acts with congressional authorization, in a twilight zone when Congress is silent, and at its lowest ebb when the President acts against the express or implied will of Congress. Whenever an exam gives you a President acting, run Youngstown first.

Also know: the nondelegation doctrine (Congress may delegate authority if it provides an "intelligible principle"); the appointment and removal rules (principal officers require Senate confirmation; Congress cannot reserve removal power over executive officers to itself); and executive privilege and immunity (a qualified privilege for presidential communications, yielding to demonstrated need, per United States v. Nixon).

State action: the gateway to rights claims

The Constitution's individual-rights guarantees constrain only government, not private actors. Before analyzing any due process or equal protection claim, confirm there is state action. Private conduct can count when the private actor performs a traditional public function or when there is sufficient entanglement between the government and the private actor. This is a frequently buried exam issue: a fact pattern featuring a private company, HOA, or shopping mall is testing whether you'll catch the state-action threshold.

Due process

Procedural due process asks: before government deprives a person of life, liberty, or property, what process is due? First identify a protected liberty or property interest; then determine what process is required using the Mathews v. Eldridge balancing test, which weighs (1) the private interest affected, (2) the risk of erroneous deprivation and the value of additional safeguards, and (3) the government's interest, including administrative burden.

Substantive due process protects certain rights from government interference regardless of process. The analysis turns on whether a fundamental right is burdened. Fundamental rights (recognized through the privacy line — marriage, contraception, family relationships, and the right to raise one's children) trigger strict scrutiny: the law must be narrowly tailored to a compelling government interest. Non-fundamental economic and social regulation gets rational basis review — upheld if rationally related to any legitimate interest. Because the scope of substantive due process is genuinely contested and shifting, expect your professor to want you to argue both sides rather than declare a winner.

Equal protection: the tiers of scrutiny

Equal Protection is the most tested doctrine in the second half of the course, and it runs on a clean decision tree. First, identify the classification the government has drawn. Then apply the corresponding level of scrutiny:

• Strict scrutiny — for suspect classifications (race, national origin, alienage) and classifications burdening fundamental rights. The law must be narrowly tailored to a compelling government interest. Most laws fail.
• Intermediate scrutiny — for quasi-suspect classifications (sex/gender and legitimacy). The law must be substantially related to an important government interest; for sex classifications the government must show an "exceedingly persuasive justification."
• Rational basis — for everything else (age, wealth, disability, general economic and social legislation). The law is upheld if rationally related to a legitimate government interest. The challenger almost always loses.

Two recurring wrinkles: (1) a facially neutral law triggers heightened scrutiny only if there is both discriminatory impact and discriminatory intent (Washington v. Davis); impact alone is not enough. (2) "Rational basis with bite" occasionally invalidates laws that rest on nothing but animus toward an unpopular group.

Common exam fact patterns and how to attack them

Con Law exams recycle a handful of scenarios. Learn to recognize them:

• Congress passes a new federal statute. Attack: identify the enumerated power (Commerce, Tax/Spend, Section 5), run Lopez/Morrison if activity may be non-economic, then check for any individual-rights limit.
• A state passes a law affecting out-of-state businesses. Attack: Dormant Commerce Clause — discriminatory or merely burdensome? Apply per se rule or Pike balancing; check the market-participant exception; check preemption.
• The President takes unilateral action. Attack: Youngstown three-category framework, then delegation/appointment/removal as relevant.
• A government classification treats groups differently. Attack: Equal Protection — identify classification, select the tier, apply it. If facially neutral, look for intent plus impact.
• Government restricts a personal/private decision. Attack: Substantive due process — fundamental right? Strict scrutiny vs. rational basis.

The connective tissue in almost every one of these is the level of scrutiny. If you can reliably identify the right power and the right standard, and then apply the standard to the specific facts, you are writing an A answer. The most common way to lose points is to state the correct test and then never use the facts.

How to attack the Con Law final

Con Law finals are frequently open-book, which changes your prep strategy: memorization matters less, and having a tight, decision-tree-organized outline you can navigate under time pressure matters more. Build your attack outline around the frameworks above — one flowchart for congressional power, one for the Dormant Commerce Clause, one for separation of powers, one for equal protection, one for due process. In the exam room, spot the government actor first, run the threshold justiciability check, and then march through the relevant framework. Argue both sides on the genuinely contested doctrines (substantive due process, close scrutiny calls) — Con Law professors reward students who see the strongest argument on each side and then reach a reasoned conclusion, not students who assert a result. Watch the clock and allocate by issue weight, not by which issue you find most interesting.