Liberal justices on the Supreme Court sought a jurisdictional exit from a major climate lawsuit as the new term opened, while attorneys general warned the case could work like a nationwide carbon tax.
The Court heard oral arguments in Suncor v. Boulder on whether state tort laws can force oil companies to pay damages for climate change, even when the alleged harms stretch far beyond one city’s borders. Fox News reported that Justice Ketanji Brown Jackson and Justice Sonia Sotomayor kept steering the hearing back to jurisdiction, asking whether the justices should decide the fight at all while it is still pending before the Colorado Supreme Court.
That posture is no small detail. If the high court ducks the federalism question, Colorado’s green light for Boulder’s state-law claims would stand, and the wider national fight would stay unresolved.
Republican attorneys general and conservative legal voices framed the stakes in plain terms. They say the suit is less about local nuisance law and more about using courts to set energy policy Congress has not enacted.
Jackson called the dispute “premature from the standpoint of this court exercising its jurisdiction.” She said the justices do not “have the whole set of facts” and do not “really know enough to be confident” that the legal theories on the table even apply.
She pressed Principal Deputy Solicitor General Sarah Harris, who argued in support of Suncor, on the timing of the federal fight.
"It feels to me like the defendants... are bringing it back to federal court before the state courts have really had a chance to sort out who is the source, what is their allegation with respect to how this causation is happening."
Sotomayor followed the same track with Suncor attorney Kannon Shanmugam. She floated sending the question back to Colorado rather than resolving it in Washington.
"If we're unsure of your characterization, because there's certainly a number of amici brief who disagree with that characterization, shouldn't we be certifying this question to the Colorado court instead of us deciding it? We have to be sure of our jurisdiction before we take it."
Carrie Severino, president of the conservative judicial group JCN, read those exchanges as a tell. She told Fox News Digital the liberal justices kept manufacturing a jurisdictional problem because they doubt the votes on the merits.
"The fact that they kept going back to trying to create a jurisdictional problem tells me they don't feel confident that they have the votes in this space. Jackson and Sotomayor were looking for an escape hatch."
Hans von Spakovsky, a senior legal fellow at Advancing American Freedom, made the same point. He said the prematurity talk is an off-ramp because the liberal justices fear losing on the core issue: whether federal law, including the Clean Air Act, preempts state claims like Boulder’s.
Chief Justice John Roberts pushed Boulder attorney Kevin Russell on what a city win would unlock. The concern was simple. A victory for Boulder could invite copycat cases across the country.
Russell said legal limits exist. He also acknowledged to Justice Clarence Thomas that Boulder’s theory could open the door to suits against other fossil-fuel businesses.
Von Spakovsky noted that Shanmugam closed on the limiting-principle problem the Court’s conservative majority often rejects. Shanmugam pointed out that more than 90,000 political jurisdictions could sue, and that individuals could file claims for global-warming damages as well.
He also stressed a point the conservative wing has long disliked: Boulder is trying to settle a major national policy fight in the courts instead of in the legislative branch.
Alabama Attorney General Steve Marshall said both Jackson and Sotomayor tried to cast doubt on the Court’s power to rule now, and that Suncor’s advocates answered that challenge. He did not stop at procedure.
"It's to basically create a carbon tax on both producers and emitters across the country, which would include, by the way, my cattlemen in Alabama producing beef for our country, those that are creating concrete to be able to build structures and be able to grow our economy. They ultimately want to bankrupt that industry to have their preferred climate change policies be in play."
Utah Attorney General Derek Brown argued the claims reach far past Colorado. In his telling, the plaintiffs want to police conduct around the world and decide energy policy from a state courthouse.
"They're literally addressing behavior that takes place all over the world. They want to regulate not just what happens in Colorado, but what happens in my state of Utah or in Saudi Arabia. That's not the way the system works. So, really, this case comes down to one main issue and that is who gets to decide things like energy policy. And ultimately, under our system, it should be Congress."
That is the federalism line running through the case. One side says Colorado may use its own tort law to chase damages for emissions tied to other states and even other continents. The other side says that kind of spillover belongs to the federal government and to Congress.
Boulder alleges ExxonMobil and Suncor knew for decades about climate risks from fossil fuels and misled the public. Communities backing the claims estimate taxpayers could face more than $100 million in adaptation costs from wildfires, drought, and damage to roads and other infrastructure.
An amended complaint cited in the coverage points to a 1977 internal ExxonMobil memo that circulated among top managers. The memo reported that “current scientific opinion overwhelmingly favors” the view that fossil fuels contribute to rising CO2 emissions.
Former Washington Gov. Jay Inslee, a Democrat and climate advocate, cast the fight as a basic right to be heard. He said families who lost homes and communities hit by fire deserve their day in court, and he accused the industry of lying about risks its own scientists flagged as far back as 1967.
Inslee’s pitch is accountability through litigation. Marshall and Brown’s rebuttal is that the real goal is to price energy out of reach and bankrupt producers when lawmakers will not enact the preferred climate program.
Climate activists gathered outside the Supreme Court before the arguments. Inside, the fight was colder and more technical: jurisdiction, preemption, and whether one city’s tort theory can revise national energy rules.
The case sits in an unusual procedural spot. The justices could dispose of it without ever deciding the state-versus-federal power clash. If they decline the federalism question, the Colorado Supreme Court’s ruling allowing Boulder’s claims would remain in force.
That outcome would leave the biggest issue hanging. Other cities and states watching the docket would still have a model to copy. Oil companies and downstream industries would still face the threat of suits aimed at global emissions through local tort law.
Von Spakovsky put the conservative worry bluntly. The Court does not like rulings with no limiting principles, rulings that open unlimited litigation. Shanmugam’s closing warning about tens of thousands of jurisdictions, plus private plaintiffs, was aimed straight at that instinct.
Supporters of Suncor say these cases could bankrupt oil companies and drive up prices for consumers. Critics of the industry say the companies hid what they knew and should pay for the bill now landing on taxpayers.
The justices must first decide whether this is even their fight yet. Jackson and Sotomayor spent the morning building the case that it is not. Marshall, Brown, Severino, and von Spakovsky heard something else in those questions: a search for an exit before the Court has to say whether federal law closes the door on this style of climate tort.
Energy policy for a continental economy is supposed to run through Congress, not through whichever city hall files first. Courts that forget that invitation will not stop at Boulder.
