May 29, 2026

At Volokh Conspiracy, Eugene Volokh has excerpts (here and here) from an amicus brief he co-authored in Suncor Energy v. Boulder County (pending at the Supreme Court next term).

On the First Amendment issue, from the summary of argument:

Trying to avoid federal preemption, plaintiffs in this and other climate-change cases have shifted from claims targeting emissions to claims alleging supposed “deception.” These “deception”-based claims are still preempted, because they still target emissions by seeking relief for injuries allegedly caused by emissions. But that shift also threatens numerous First Amendment violations and the possibility of conflicting regulations of national speech, association, and petitioning that further support preemption of such local efforts. Climate-change plaintiffs seek to punish energy companies not just for the asserted consequences of emissions, which result from the decisions and actions of millions of other actors and governments, but for the companies’ speech about climate change that plaintiffs claim led to such emissions.

This case is an example of this pattern, but it is not an outlier: There are many like it across the country. And there likely will be many more in the field of climate change, with some potentially taking diametrically opposed views of what scientific speech is true or false. This Court should keep the serious First Amendment issues underlying this litigation campaign in mind in deciding this case. The danger to First Amendment rights is another reason favoring uniform national regulation of these issues as opposed to opportunistic state and local overreach that seeks to punish and suppress speech and debate on this controversial topic.

And on the commerce clause issue:

Besides the serious First Amendment concerns favoring a broad preemption ruling that would avoid such constitutional problems, the state-law suits in this case and others around the country seek to regulate national and international commerce in violation of the Commerce Clause and related structural constraints on extraterritorial regulation.

Boulder attempts to penalize multinational companies not merely for the local and immediate consequences of any local operations, but for the multi-causal long-term consequences of their sales and speech around the country and around the globe. And it is seeking to impose liability on Suncor for the joint consequences of millions of decisions by actors beyond its borders, operating in interstate and international trade. Whatever reticence this Court might have in preempting largely ordinary State regulation that incidentally affects interstate commerce, that reticence would be misplaced when it comes to such a major encroachment on international commerce and an attempt to impose Boulder’s views of nuisance and appropriate speech on actors not just in other States but also in foreign countries.

For good reasons, this Court has understood Congress’s delegated power over foreign commerce as exclusive of State powers. That understanding is consistent with the original public meaning of both the delegation of power to Congress in Article I, and the catch-all reservation of powers to the states and the people in the Tenth Amendment.

Regardless whether the Constitution supports the somewhat variable dormant interstate Commerce Clause as it had evolved over the years, a more textually grounded reading of the clause supports exclusive federal authority here. Boulder’s attempt to impose Colorado law on interstate and foreign commerce conflicts with the Commerce Clause, Article I’s delegation of powers, and the Tenth Amendment. And it more broadly conflicts with the Constitution’s structure, which organizes horizontal relations among States on principles of (partial) state autonomy, equality, territoriality, non-aggression, and mutual recognition.

I think the County will likely lose on preemption, but the constitutional issues will be on the Justices’ minds in the background.  I’m less sure of the correct originalist perspective on these issues.  In any event, it’s an important case for originalists to think about for next term.

Posted at 6:05 AM