The U.S. Supreme Court has twice relisted two pending petitions for certiorari, signaling elevated interest in granting review . The cases are *Union…
The U.S. Supreme Court has twice relisted two pending petitions for certiorari, signaling elevated interest in granting review [1]. The cases are *Union Carbide Corp. v. Sommerville*, which presents a challenge to the standard federal courts apply when deciding whether to admit expert testimony, and *Walters v. Coleman*, which raises habeas corpus questions involving a veteran who carried out violent attacks [1]. A second relist, while not determinative, historically correlates with a grant of certiorari more often than a single-conference consideration [1].
*Union Carbide Corp. v. Sommerville* centers on the gatekeeping framework courts apply under *Daubert v. Merrell Dow Pharmaceuticals* and Federal Rule of Evidence 702, which together require trial judges to screen expert testimony for reliability before it reaches a jury [1]. The petition asks the Court to address how rigorously district courts must apply that standard, a question that has produced inconsistent outcomes across circuit courts [1]. *Walters v. Coleman* raises distinct questions about the scope of federal habeas relief available to a petitioner with a military background whose case involves violent offenses [1]. Both cases were flagged at the Supreme Court's conference and then returned to the relist queue rather than resolved by a grant or denial [1].
The procedural significance of *Union Carbide* extends well beyond toxic tort litigation. The *Daubert* framework and Rule 702 govern expert admissibility in every category of complex federal litigation, including securities fraud, patent infringement, antitrust, and product liability [1]. A recalibration of how strictly district courts must perform that gatekeeping function could shift case outcomes at the trial level, increase pre-trial motion practice around expert qualifications, and alter settlement leverage in expert-heavy disputes [1]. Defense-side litigants have long argued that some circuits apply the standard too loosely, allowing speculative expert opinions to survive to trial; plaintiffs' counsel have argued the opposite in other venues [1].
*Walters v. Coleman* presents a narrower but consequential question about the availability of habeas corpus relief, a remedy the Court has addressed repeatedly in recent terms as it has tightened procedural requirements for post-conviction petitioners [1]. The intersection of the petitioner's veteran status and the violent nature of the underlying conduct may add factual complexity to the legal analysis [1].
If the Court grants certiorari in either case at an upcoming conference, argument would likely be scheduled for the October 2026 term [1]. A denial would end the relist cycle and leave the lower court rulings in place [1].
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**Meta Description:** The Supreme Court has twice relisted Union Carbide v. Sommerville and Walters v. Coleman, raising the odds of cert grants on Daubert standards and habeas relief.
**Slug:** scotus-relists-union-carbide-walters-daubert-habeas
**Tags:** Legal News, Appellate Development, Union Carbide v. Sommerville, United States, Washington DC, Expert Witnesses, Daubert, Habeas Corpus, U.S. Supreme Court, Union Carbide Corporation
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**Metadata:**
– subject: SCOTUS Relist Watch, Union Carbide v. Sommerville, Walters v. Coleman
– subject_type: Appellate Development
– date: 2026-05-20
– jurisdiction: federal
– country: United States
– region: N/A
– city: Washington
– key_people: N/A
– key_organizations: U.S. Supreme Court, Union Carbide Corporation
– themes: Expert Witnesses, Daubert, Habeas Corpus, SCOTUS Cert Watch
– significance: A cert grant in Union Carbide could reset the federal standard for expert witness admissibility, reshaping motion practice and trial strategy across toxic torts, securities fraud, patent, and antitrust litigation nationwide.
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**References:**
[1] SCOTUSblog. (2026, May 21). More opinions on the way — Relist Watch. https://www.scotusblog.com/2026/05/more-opinions-on-the-way/