- May P join the state-law contract claim in the federal antitrust action?
Answer: No, because the contract claim is not part of the same case or controversy as the antitrust claim and has no independent basis of subject-matter jurisdiction.
When you see a joinder question in federal court, separate two ideas: procedural joinder rules and subject-matter jurisdiction. Rule 18(a) is broad—it lets a party join any claim it has against an opposing party, even unrelated ones. But that broad joinder rule cannot manufacture federal jurisdiction over a claim that has no independent basis and is not within supplemental jurisdiction.
Here, the federal antitrust claim gives the court original jurisdiction, so P may join almost any other claim against D under Rule 18—if jurisdiction exists. The state-law contract claim arises from a separate, unrelated business deal, so it is not part of the same "case or controversy" as the antitrust claim. It therefore cannot get supplemental jurisdiction under §1367(a). Nor can it stand alone: both parties are California citizens, so diversity jurisdiction is unavailable. Thus P may not join the contract claim.
The first wrong answer mistakenly assumes Rule 18's permissive joinder also creates subject-matter jurisdiction; only Congress can do that, and §1367 limits supplemental jurisdiction to related claims. The answer claiming Rule 18 requires the same transaction or occurrence is also wrong—that test applies to party joinder and some counterclaims, but Rule 18 itself has no such restriction. Finally, the answer saying §1367(a) covers all state-law claims ignores the statute's express "same case or controversy" requirement.
The key exam takeaway: always ask two questions separately—may I join the claim under Rule 18, and do I have jurisdiction over it? A broad procedural rule never waives Article III's Article III limits.
- Which of the following is the most significant joinder issue raised by Nuez's action?
Answer: Whether Nuez may use interpleader to join the competing claimants and require them to litigate their entitlement to the same policy proceeds.
A stakeholder facing competing claims to the same fund is the classic interpleader fact pattern. Here Nuez has already deposited the $50,000 with the court and asked the court to decide which claimant owns it; that provides the most direct joinder basis. Rule 22 allows a stakeholder to join all adverse claimants in one action to litigate their entitlement to the same res, protecting Nuez from double liability.
The correct choice is therefore that Nuez may use interpleader to join Lopez and Moya. The other options are traps. "Moya must be joined as a necessary party" is less precise: Rule 19 necessary-party joinder concerns complete relief and protecting absent persons, but interpleader—not necessary-party analysis—is the procedural device designed for competing claims to identical proceeds. "Implead Moya" is wrong because impleader under Rule 14 is for a defendant seeking to shift liability to a third party; Nuez is not claiming Moya owes it anything—it simply does not know which claimant should receive the $50,000. Finally, "Lopez and Moya may be joined as defendants only if they are citizens of different states from each other" restates a false premise: interpleader jurisdiction does not require the defendants to be diverse from one another; under statutory interpleader, minimal diversity among adverse claimants may suffice, and ordinary party joinder rules do not impose that requirement.
Study tip: whenever you see multiple parties claiming the same limited fund, think interpleader immediately—and do not confuse it with necessary joinder, impleading, or ordinary diversity joinder.
- Which of the following is the most significant joinder issue raised by these facts?
Answer: Whether Carter is an indispensable party because he has an interest in the warehouse and an existing party may be exposed to inconsistent obligations if Carter is absent.
Whenever a nonparty appears to have an interest in the property at issue, this is a Rule 19 required-party and-indispensable-party problem—not a question of claim barring. Carter had a prior contract to buy the warehouse; even though he backed out, he may still claim an interest. Under Rule 19, the court must decide whether Carter is required: whether disposing of the action without him would impair his ability to protect that interest or leave Bennett exposed to substantial risk of inconsistent obligations. A judgment for Alta could require Bennett to perform or pay while Carter's separate claim to the warehouse could also demand relief, risking inconsistent obligations. Thus the most significant joinder issue is whether Carter is an indispensable party: if he cannot be joined, the court applies Rule 19(b) to determine whether in equity and good conscience the action should proceed or dismiss.
The other choices confuse different joinder doctrines. The idea that Carter's absence "bars" Alta's contract claim is wrong: absence of a nonparty does not extinguish a valid claim; it may affect whether the court can proceed without him. Impleader under Rule 14 is also wrong: Carter is not liable to Bennett for any obligation Bennett owes Alta; there was no contract between Carter and Bennett, and Carter's dealings with Alta concern a different sale, not contribution or indemnity. Joining Alta and Carter as plaintiffs is wrong because their potential claims are not against the same party from the same transaction: Carter has no claim against Bennett under Bennett's later contract; any claim involving Carter would arise from his earlier contract with Alta. So when a person with a possible property interest is absent, run through Rule 19's two-step test; do not reach for Rule 14 or Rule 20.
- Which joinder issue is most likely to determine whether Inez's new claim against Kira may proceed?
Answer: Whether the fraud claim against Kira is so related to Inez's original claims that the court may exercise supplemental jurisdiction over it.
Whenever a plaintiff amends to add a claim against an existing defendant, ask two questions: is the claim transactionally related to the original suit, and does the court have jurisdiction over it? Here, Inez's new fraud claim against Kira arises out of the same joint-venture misappropriation that underlies Inez's original accounting and profits claim. Under 28 U.S.C. § 1367(a), supplemental jurisdiction extends to claims so related to the original complaint that they form part of the same case or controversy. Because the fraud claim shares that common nucleus of operative facts, the joinder issue that matters is whether supplemental jurisdiction permits it to proceed.
The crossclaim option is a trap: a crossclaim is a claim by one co-party against another, like Javon's claim against Kira. Inez's claim is a plaintiff's claim against a defendant, not a crossclaim. The compulsory-counterclaim option is also wrong: counterclaims are asserted by a defending party against an opposing party, and Inez is the plaintiff, not the defendant. As for intervention, Inez is already a party; she would need leave to amend, but she does not need to intervene.
On joinder questions, first identify each party's role—plaintiff, defendant, co-party, or non-party. Then check whether the new claim shares operative facts with the original claims; if so, supplemental jurisdiction is likely available.
- Should the court grant the homeowners' motion to intervene as of right?
Answer: Yes, because the homeowners claim an interest in affected property, the consent decree may impair that interest, and the EPA's public-interest mandate does not include their private damages claim.
This question tests intervention as of right under Rule 24(a)(2), especially how the adequacy-of-representation requirement interacts with a government plaintiff. When you see a government party, remember that a presumption of adequacy exists—but it is rebuttable if the government's public-interest mission doesn't cover the applicant's private interests.
The homeowners win because they satisfy every element. They claim an interest in their properties—land over the contaminated plume. The proposed consent decree would set cleanup standards that could directly impair that interest, and the EPA is not seeking damages for lost property values. Under In re Acme, the presumption is overcome when the government's public-interest mandate makes it unable to represent private property claims. That is exactly what happens here: EPA protects the public, not these homeowners' individual monetary losses.
The first wrong choice ("No, because a governmental plaintiff is presumed…") misreads the presumption as irrebuttable—but Acme explicitly allows rebuttal when the government can't represent private interests. The second wrong choice ("No, because the homeowners may bring a separate damages action") confuses an alternative remedy with the absence of impairment under Rule 24(a)(2); the consent decree could still practically impair their property interest regardless of a later damages suit. The third wrong choice ("Yes, because the homeowners satisfy the standard for permissive intervention…") is a trap: permissive intervention under Rule 24(b) is discretionary and requires only a common question—but the homeowners have satisfied the stricter as-of-right standard, so the court must grant intervention, not merely may.
Study tip: On the bar exam, when a government party is involved, immediately ask—does the applicant seek a private interest the government's public mandate doesn't cover? If yes, the presumption falls, and intervention as of right is likely.
- Which joinder device is most directly raised by Evers' desire to bring Frye into the pending case?
Answer: Impleader, because Frye may be liable to Evers for all or part of Dane's claim against Evers.
When you see a joinder question, first ask: who is bringing whom into the case, and why? A defendant who wants a nonparty brought in to answer for the plaintiff's claim is impleader under Rule 14. Evers is not adding a new claim against Dane; Evers is saying, "If I owe Dane, Frye owes me." That is the classic third-party claim for indemnity or contribution. So impleader is correct because Frye may be liable to Evers for all or part of Dane's slip-and-fall claim. Note the unrelated repair-cost claim: it is not derivative of Dane's claim, so it cannot ride along in the impleader—Evers would need a separate suit.
Permissive joinder is wrong because that device lets a plaintiff join multiple parties with common questions; it is not the defendant's tool to pull in an indemnitor. Intervention is the opposite direction: Frye would seek to enter the case voluntarily to protect his own interest, but Evers is forcing him in. Compulsory joinder concerns persons who must be joined because the court cannot accord complete relief without them; Frye is not needed for just adjudication of Dane's claim against Evers—he is merely a potential source of indemnity.
Study tip: impleader = "third-party complaint" for derivative liability. If the defendant's claim against the new party is independent of the plaintiff's claim, it is not impleader.
- Which joinder issue is most directly presented by the operator's motion concerning Gale and Holt?
Answer: Whether Gale and Holt may be joined as plaintiffs because their claims arise from the same incident and share common questions of law or fact.
This question tests the joinder rules, so start by sorting the procedural devices: permissive joinder of parties (Rule 20), intervention (Rule 24, impleader (Rule 14, and compulsory counterclaims (Rule 13. The operator wants Gale and Holt to litigate together, which raises permissive joinder of plaintiffs.
Permissive joinder requires that the claims arise from the same transaction, occurrence, or series of transactions and that they share at least one common question of law or fact. Here, both Gale and Holt were injured by the same fireworks malfunction at the same county fair. Their claims arise from the same occurrence and will share common factual issues, such as how the display malfunctioned and whether the operator was negligent. Therefore, the operator's motion most directly asks whether Gale and Holt may be joined as plaintiffs under Rule 20.
The other choices fit the wrong procedural device. Intervention would apply if Holt sought to join Gale's existing lawsuit as a party with a substantial interest—but Holt has filed her own separate action, so she is not seeking to intervene. Impleader is for a defendant bringing in a third party who may be liable to the defendant for part or all of a plaintiff's claim; the operator is not claiming Holt is liable on Gale's claim. And the compulsory-counterclaim issue concerns the operator's contribution claim against Gale alone, not whether Gale and Holt may be joined as plaintiffs—so it is a separate joinder question from the motion to combine the two plaintiffs' cases.
When you see a motion to combine plaintiffs, think Rule 20 first: same transaction plus common question. That pattern will guide you to the correct joinder device.
- Which joinder issue is most likely to determine whether Quinn's new action may proceed?
Answer: Whether Quinn's fraud claim is a compulsory counterclaim that should have been asserted in Pruitt's earlier action.
When you see a party trying to file a second lawsuit after an earlier federal judgment, first ask: could this claim have been brought in the first case? That's the heart of claim preclusion and compulsory counterclaims. Under Rule 13(a), Quinn's fraud claim arises out of the same "transaction or occurrence" as Pruitt's breach-of-contract claim — the same consulting agreement and the same fees. Because Quinn failed to assert it as a compulsory counterclaim, he lost it; the new action should be dismissed. That is why the "compulsory counterclaim" choice is correct.
The permissive joinder choice is irrelevant: permissive joinder concerns adding parties in the first suit, not Quinn's duty to raise defenses to Pruitt's claim. Impleader is also wrong because impleading a third-party defendant for indemnity or contribution has nothing to do with Quinn suing Pruitt after judgment. And calling the fraud claim a "crossclaim" misstates the relationship: crossclaims are between co-parties on the same side (e.g., two plaintiffs), not against an opposing party. Quinn sued his adversary, so the fraud claim was a counterclaim, not a crossclaim.
Study tip: whenever a defendant later sues the plaintiff over events from the first case, check the "same transaction" test under Rule 13(a) before assuming the claim can proceed. If it was compulsory and omitted, it's gone.
