Supreme Court opens term Monday with Suncor climate case
The Supreme Court’s 2026–27 term opens Monday with argument in Suncor Energy v. Boulder County on whether state climate suits against energy companies may proceed. Justice Alito is not participating. A ruling could reshape dozens of similar local cases nationwide.
The justices return Monday to a docket that starts with climate liability. Amy Howe’s SCOTUSblog preview explains that Suncor Energy Inc. v. County Commissioners of Boulder County asks whether Boulder’s state-law damages suit against Suncor and ExxonMobil can go forward or is barred by federal law and constitutional structure. Argument is Oct. 5, day one of the new term. Boulder seeks compensation for climate-protection costs and alleges deception about fossil fuels; companies warn of an industry-crushing “carbon tax” via state courts.
Threshold fights include whether the Colorado Supreme Court’s ruling is final enough for U.S. Supreme Court review. On the merits, companies and the Trump administration stress interstate emissions and foreign-affairs preemption; Boulder says it seeks money, not emissions caps, and that the Clean Air Act does not wipe out state tort claims. Justice Samuel Alito’s non-participation raises 4–4 tie odds that would leave Colorado’s go-ahead intact. Immigration-detention cert petitions from earlier slate notes remain in the Court’s broader politics orbit but are not Monday’s argument.
Where to listen: the Court typically posts argument audio the same day at supremecourt.gov. Watch how many justices buy finality objections before reaching preemption — and whether a short bench changes settlement calculus in copycat suits.
Boulder sued in 2018; energy companies tried and failed to federalize the case, then lost a dismissal bid before the Colorado Supreme Court let state claims proceed. SCOTUSblog flags the case as among the term’s most significant business disputes because copycat local suits stretch from coast to coast. Monday’s argument is the opening bell, not the final word.
What we know:
OT2026 opens Monday with Suncor/Boulder; Alito is out; dozens of similar suits could turn on the result.
What we don’t:
Whether the Court dismisses on finality grounds or reaches the federal-preemption merits.
Where outlets agree SCOTUSblog’s case page and preview agree the new term opens with Suncor/Boulder as a lead argument on state climate suits.
Where they differ Energy companies and the administration urge federal preemption; Boulder says state tort claims for local harms should proceed.