1.1 Subject-Matter Jurisdiction: Federal Question & Diversity

1.1 Subject-Matter Jurisdiction: Federal Question & Diversity

Subject-matter jurisdiction (SMJ) is the foundational requirement that determines whether a federal court possesses the constitutional and statutory power to adjudicate a particular type of dispute. Unlike personal jurisdiction, which concerns authority over the parties, subject-matter jurisdiction concerns authority over the controversy itself.

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Constitutional Bounds vs. Statutory Grants

Federal courts are courts of limited jurisdiction. Under Article III, Section 2 of the United States Constitution, federal judicial power extends only to enumerated categories of cases and controversies. However, Article III is not self-executing for the lower federal courts. Congress must affirmatively confer jurisdiction by statute:

1. Constitutional Ceiling (Article III, § 2): Sets the outer limits of judicial power (e.g., allowing jurisdiction whenever there is "minimal diversity"—any one plaintiff diverse from any one defendant, or any federal ingredient in the dispute).
2. Statutory Grants: Congress has granted narrower jurisdiction to federal district courts by statute, notably:
   • 28 U.S.C. § 1331: Federal Question Jurisdiction.
   • 28 U.S.C. § 1332: Diversity of Citizenship Jurisdiction.

The Non-Waivability of Subject-Matter Jurisdiction

Because SMJ delimits the sovereign authority of the federal government relative to state courts, it is non-waivable and non-forfeitable:

• No Consent: Parties cannot confer SMJ by consent, stipulation, contract, or failure to object.
• Sua Sponte Dismissal (FRCP 12(h)(3)): The court must dismiss the action on its own initiative (sua sponte) at any point in the litigation—including at trial or for the first time on appeal—if it determines that it lacks subject-matter jurisdiction.
• Contrast with Personal Jurisdiction and Venue: Personal jurisdiction and venue are personal privileges of the defendant that are waived if not timely asserted in a Rule 12 motion or responsive pleading (FRCP 12(h)(1)). SMJ survives through the exhaustion of all direct appeals.

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Federal Question Jurisdiction (28 U.S.C. § 1331)

Under 28 U.S.C. § 1331, federal district courts have original jurisdiction over all civil actions "arising under the Constitution, laws, or treaties of the United States." There is no amount in controversy requirement for federal question cases.

The Well-Pleaded Complaint Rule

To determine whether an action "arises under" federal law, courts apply the Well-Pleaded Complaint Rule established in Louisville & Nashville Railroad Co. v. Mottley (1908):

• Face of the Complaint: The federal question must be presented on the face of the plaintiff's properly pleaded complaint, asserting a right or cause of action created by federal law.
• Anticipated Defenses Insufficient: A plaintiff cannot create federal question jurisdiction by anticipating that the defendant will raise a federal defense (such as federal preemption, a federal statutory immunity, or a constitutional defense). Even if the defense is the sole contested issue in the lawsuit, it cannot establish § 1331 jurisdiction.
• Counterclaims Insufficient: A defendant's counterclaim asserting a federal cause of action cannot confer § 1331 jurisdiction over the plaintiff's original state-law action (Holmes Group, Inc. v. Vornado Air Circulation Systems, Inc.).

State-Law Claims with Embedded Federal Issues

In narrow circumstances, a state-created cause of action can support § 1331 jurisdiction if it contains an embedded, essential federal issue. Under Grable & Sons Metal Products, Inc. v. Darue Engineering & Manufacturing (2005), federal jurisdiction exists over a state-law claim if the federal issue is:

1. Necessarily raised by the plaintiff's well-pleaded claim;
2. Actually disputed between the parties;
3. Substantial to the federal system as a whole; and
4. Capable of being resolved in federal court without disrupting the congressionally approved balance of federal and state judicial responsibilities.

MBE Tip: If a fact pattern presents a plaintiff suing under a state breach of contract or negligence theory, and the plaintiff notes that the defendant will argue a federal statute permits the conduct or that federal regulations preempt the claim, there is no federal question jurisdiction. The complaint on its face alleges only state-law causes of action.

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Diversity of Citizenship Jurisdiction (28 U.S.C. § 1332)

Under 28 U.S.C. § 1332(a), federal district courts possess original jurisdiction over civil actions where:

1. The dispute is between citizens of different states (or citizens of a state and foreign citizens/subjects); and
2. The amount in controversy exceeds $75,000, exclusive of interest and costs.

The Complete Diversity Rule

In Strawbridge v. Curtiss (1806), Chief Justice John Marshall established the Complete Diversity Rule for § 1332:

• The Rule: No plaintiff may be a citizen of the same state as any defendant.
• Co-Parties: Multiple plaintiffs may share citizenship with each other, and multiple defendants may share citizenship with each other. Diversity is destroyed only if any plaintiff shares state citizenship with any defendant.
• Timing: Diversity of citizenship is tested strictly at the moment the complaint is filed. If complete diversity exists at filing, a party's subsequent move to another state does not destroy jurisdiction. Conversely, if complete diversity was lacking at filing, a party's post-filing relocation will not cure the defect.

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Determining Citizenship of Parties

Applying the complete diversity rule requires identifying the legal citizenship of each party category.

1. Natural Persons (Individuals)

A human being is a citizen of the U.S. state where they are domiciled:

• Definition of Domicile: Domicile requires two concurrent elements:
  1. Physical presence in the state; and
  2. The subjective intent to remain indefinitely (animus manendi).
• Retention Rule: An individual can have only one domicile at a time. A person retains their existing domicile until a new domicile is affirmatively established by physically moving to a new state with the intent to make it their permanent home.
• Temporary Relocations: Temporary presence in another state—for higher education, military deployment, temporary job assignments, or medical treatment—does not change domicile if the individual intends to return or move elsewhere upon completion.

2. Corporations (28 U.S.C. § 1332(c)(1))

A corporation possesses dual citizenship for diversity purposes. It is deemed a citizen of:

1. Every state and foreign state of its incorporation; AND
2. The single state where it has its Principal Place of Business (PPB).

The "Nerve Center" Test

In Hertz Corp. v. Friend (2010), the Supreme Court held that a corporation's principal place of business is its nerve center:

• The place where the corporation's officers direct, control, and coordinate the corporation's high-level activities.
• In practice, this is almost always the corporation's corporate headquarters or executive office.
• Substantial manufacturing, sales volume, or employee concentration in another state does not shift the PPB away from the executive nerve center.

3. Unincorporated Associations (Partnerships, LLCs, LLPs, Joint Ventures)

Unlike corporations, unincorporated business entities are not treated as separate jurisdictional citizens under § 1332(c)(1):

• Citizenship Rule: An unincorporated entity—such as a Limited Liability Company (LLC), limited partnership (LP), general partnership (GP), or limited liability partnership (LLP)—shares the citizenship of every single one of its partners or members (Carden v. Arkoma Associates).
• Multi-Tiered Entities: If an LLC member is itself another LLC or partnership, the court must trace through the ownership layers to identify the citizenship of every ultimate underlying member.
• Diversity Destroyer: If an LLC has 100 members in 49 states, that LLC is a citizen of all 49 states for complete diversity purposes.

4. Legal Representatives (Estates, Infants, Incompetents)

Under 28 U.S.C. § 1332(c)(2), the legal representative of an estate of a decedent, an infant, or an incompetent person is deemed to be a citizen only of the same state as the decedent, infant, or incompetent.

• The personal domicile of the executor, administrator, guardian, or conservator is legally irrelevant.

5. Alienage Jurisdiction (28 U.S.C. § 1332(a)(2))

Federal courts have jurisdiction over suits between a citizen of a U.S. state and a citizen or subject of a foreign state:

• Lawful Permanent Residents (LPRs): Under § 1332(a)(2), the district courts do not have diversity jurisdiction over an action between a citizen of a state and a citizen of a foreign state who is lawfully admitted for permanent residence in the United States and is domiciled in the same state.
• Alien vs. Alien: Suits solely between foreign citizens (e.g., a citizen of France suing a citizen of Germany) without any U.S. citizen parties do not satisfy § 1332.

6. Class Actions

In a traditional class action under Rule 23, complete diversity is evaluated by looking only to the citizenship of the named class representative(s). The citizenship of unnamed absent class members is ignored for complete diversity purposes (Supreme Tribe of Ben-Hur v. Cauble).

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The Amount in Controversy Requirement

Diversity actions require that the matter in controversy "exceeds the sum or value of $75,000, exclusive of interest and costs" (i.e., $75,000.01 or more).

Good-Faith Pleading and the Legal Certainty Test

• Good-Faith Allegation Controls: The plaintiff's claim in the complaint governs the amount in controversy, provided it is made in good faith (St. Paul Mercury Indemnity Co. v. Red Cab Co.).
• Legal Certainty Dismissal: The court will dismiss for failure to meet the amount in controversy only if it appears to a legal certainty from the face of the pleadings or governing law that the plaintiff cannot recover more than $75,000 (e.g., a binding statutory cap limits recovery to $50,000).
• Subsequent Recovery Less Than $75,000: If a plaintiff in good faith claims $100,000 but the jury awards only $20,000, subject-matter jurisdiction is not destroyed. However, under 28 U.S.C. § 1332(b), the court has discretion to deny costs to the plaintiff or assess litigation costs against the plaintiff.
• Excluded from Calculation: Ordinary court costs and statutory interest accrued merely due to delay in payment are excluded. However, attorney's fees recoverable by contract or statute, and punitive damages permitted by substantive law, are included in the amount in controversy.

Aggregation Rules

Whether claims can be combined to satisfy the $75,000.01 threshold depends on party alignment:

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Comparison: Federal Question vs. Diversity Jurisdiction