Supreme Court Justice Clarence Thomas Calls for Reexamination of Improper Joinder Doctrine

Supreme Court Justice Clarence Thomas has expressed a desire for the Court to reconsider the improper-joinder doctrine, a legal principle that has been in place for over a century. His comments came in a concurring opinion related to the Supreme Court's unanimous ruling in the case of Hain Celestial Group, Inc. v. Palmquist. This case involved a Texas couple, Sarah and Grant Palmquist, who alleged that their child's health issues were linked to heavy-metal contamination in baby food produced by Hain Celestial Group, which they purchased at Whole Foods.

Newsweek

The improper-joinder doctrine allows federal courts to dismiss nondiverse defendants from a case to establish jurisdiction based on diversity of citizenship. In this instance, Hain Celestial Group sought to remove the case to federal court, arguing that Whole Foods had been improperly joined because it is headquartered in Texas, the same state as the plaintiffs. The District Court initially agreed, but the Fifth Circuit Court of Appeals later ruled that Whole Foods should not have been dismissed, as the Palmquists had presented plausible claims against the retailer.

Newsweek

In his concurring opinion, Thomas articulated skepticism regarding the improper-joinder doctrine, asserting that it permits federal courts to extend their jurisdiction by evaluating the merits of claims over which they lack jurisdiction. He argued that federal courts should not dismiss nondiverse parties based on perceived weaknesses in the merits of claims against them. Thomas emphasized that existing precedents only allow for dismissal in cases of bad faith or actual fraud, not based on the merits of the claims.

Newsweek

Justice Thomas stated, “Federal courts sitting in diversity likely cannot dismiss nondiverse parties based on their view of the merits of the claims against those parties. Doing so appears unfaithful to Congress’s limits on our diversity jurisdiction and inconsistent with this Court’s precedents.” He urged that the Court should address the improper-joinder doctrine in a future case where the issue is fully briefed.

Newsweek

Justice Sonia Sotomayor, in the Court's opinion, noted that no party had requested the Court to revisit the Fifth Circuit’s ruling regarding the improper-joinder decision. She highlighted that the District Court would have lacked jurisdiction had it performed the joinder analysis correctly at the outset.

Newsweek

Justice Thomas's call for a reexamination of the improper-joinder doctrine may lead to future cases where this issue is more thoroughly explored, potentially impacting how federal courts handle jurisdictional matters involving nondiverse defendants.

Newsweek

• “I write separately to note my skepticism of the doctrine of ‘improper joinder,’ which the District Court invoked to dismiss Whole Foods in this case.” — Justice Clarence Thomas

Newsweek

• “ “Federal courts sitting in diversity likely cannot dismiss nondiverse parties based on their view of the merits of the claims against those parties.” — Justice Clarence Thomas

Newsweek

• “It is important to emphasize at the outset ‘two ‘givens’ in this case.” — Justice Sonia Sotomayor

Newsweek