On June 30, 2022, the Supreme Court decided West Virginia v. EPA and held that the Environmental Protection Agency lacked authority under the Clean Air Act to cut power-plant carbon emissions by shifting electricity generation from coal to cleaner sources. The decision did more than limit one climate rule. It gave a name and a firm footing to the "major questions doctrine," under which courts will not read a statute to grant an agency power over questions of vast economic and political significance unless Congress has clearly said so. The doctrine has since reshaped administrative law well beyond the environment.
In this TalksOnLaw interview, Joel Cohen sits down with Lisa Heinzerling, a professor at Georgetown University Law Center and a leading scholar of environmental and administrative law, to unpack the case, the doctrine, and what it means for agencies and for Congress.
The Clean Power Plan and Its Long Road to the Court
The case concerned the Obama-era Clean Power Plan, issued in 2015 under Section 111 of the Clean Air Act, which directs EPA to set emission limits for stationary sources based on the "best system of emission reduction." EPA read that language to permit "generation shifting," moving power production from coal toward natural gas and renewables. Heinzerling explains that the plan's targets were modest and were met on schedule even though the rule never took effect. The Supreme Court stayed it in 2016 through an unprecedented emergency order, an early example of what is now called the shadow docket. The Trump administration then repealed the plan and replaced it with a weaker rule, the D.C. Circuit struck down both, and the Biden administration asked that the old plan not be revived. By the time the Court took the case, no rule was in effect, and Heinzerling argues that ripeness and the Court's discretionary docket gave it every reason to decline.
From Interpretive Aid to Clear-Statement Rule
Chief Justice Roberts's majority opinion rejected EPA's generation-shifting approach under the major questions doctrine. Heinzerling traces the idea to cases such as FDA v. Brown & Williamson Tobacco Corp. (2000), where the economic and political significance of regulating tobacco was one argument among many. It later became a reason to withhold Chevron deference. In West Virginia, and in the 2021 and 2022 COVID decisions striking down the CDC's eviction moratorium and OSHA's vaccine-or-test rule, it became something stronger: a clear-statement rule. Once a court decides that a question is "major," the government loses unless the statute speaks with unmistakable clarity.
Critiques of the Doctrine
Heinzerling argues that whether a question is "major" is subjective and depends entirely on how it is framed. The same rule can look like routine pollution control or like a transformation of the electric grid. The Court's multi-factor test considers economic and political significance, the age of the statute, the agency's past practice, Congress's failure to pass similar legislation, and whether the provision is an "ancillary" one. She contends that this lets judges skip careful statutory analysis and disregard the agency's expertise and evidence, and that it burdens Congress itself, which must now anticipate which future questions a court will deem major. She also discusses Justice Kagan's dissent, which called the doctrine a "get-out-of-text-free card," and the majority's reliance on press releases and testimony outside the rulemaking record.
Chevron, Nondelegation, and the Separation of Powers
The conversation explains Chevron deference, the 1984 doctrine under which courts deferred to an agency's reasonable reading of an ambiguous statute, and how its political valence shifted as presidents of both parties used agency power. Heinzerling also connects the major questions doctrine to the nondelegation doctrine, the principle that Congress may not hand its legislative power to agencies, which the Court last used to strike down federal statutes in 1935. In her view, the major questions doctrine lets the Court do much of nondelegation's work while appearing more modest, though Justice Gorsuch's concurrence showed that some justices want to revive nondelegation directly.
What Remains of EPA's Authority
The decision did not eliminate EPA's power to regulate greenhouse gases. Heinzerling notes that the agency kept its authority over cars and trucks and over stationary sources under Section 111, and that controls on other pollutants often reduce carbon as well. For agencies drafting new rules, she suggests grounding them in their own regulatory history, while warning that the doctrine may discourage agencies from taking on new problems and that it makes legislating harder for a Congress that often relies on deliberately general language to reach compromise.
What to Know Now
This conversation was recorded in the summer of 2022, weeks after West Virginia v. EPA, and the trends Professor Heinzerling describes have largely played out. In Biden v. Nebraska (2023) the Court applied the major questions doctrine to strike down the federal student-loan forgiveness program, and in Loper Bright Enterprises v. Raimondo (2024) it overruled Chevron, holding that courts must exercise their own judgment about what a statute means rather than defer to an agency's reasonable interpretation. Sackett v. EPA (2023) narrowed the Clean Water Act's reach over wetlands without relying on the major questions doctrine. The nondelegation doctrine has not been revived: in FCC v. Consumers' Research (2025) the Court rejected, 6-3, a nondelegation challenge to the Universal Service Fund. In Learning Resources, Inc. v. Trump (February 2026) the Court held that the International Emergency Economic Powers Act does not authorize the President's sweeping tariffs; Chief Justice Roberts invoked the major questions doctrine in parts of his opinion joined only by Justices Gorsuch and Barrett, and Justice Barrett described the doctrine as an application of ordinary statutory interpretation. On the environmental side, EPA issued new power-plant carbon standards in 2024 built on carbon capture rather than generation shifting; the current EPA repealed most of those standards in September 2026 and has proposed ending power-plant greenhouse gas regulation entirely, citing the major questions doctrine among other grounds, and in February 2026 it rescinded the 2009 endangerment finding that underpinned vehicle greenhouse gas standards. The SEC adopted a scaled-back climate disclosure rule in 2024 but stopped defending it in court in 2025.
