What is the National Climate Assessment and why is a critic running it

What the National Climate Assessment is and who now runs it

The National Climate Assessment is the United States government’s flagship report on how a changing climate is affecting the country. Under the US Global Change Research Program, the assessment is a congressionally mandated review, typically issued every few years, that translates global climate science into regional projections for the contiguous United States, Alaska, Hawai’i and the territories. It is the document that states, cities, utilities and insurance underwriters reach for when they need an authoritative federal baseline of expected heat, sea-level rise, drought and storm risk. The most recent assessment, published in 2023, concluded that human-caused global warming is supercharging wildfires in the West, droughts in the Great Plains and heat waves from coast to coast, according to The New York Times.

The New York Times reports that the Trump administration has appointed Matthew M. Wielicki, a former University of Alabama geochemist with no formal training in climate science, to lead the Global Change Research Program that compiles the assessment. On social media and on podcasts, Wielicki has argued that mainstream climate science is “too dire” and understates the positive effects of a warming planet. The appointment places a vocal critic of the prevailing scientific consensus at the head of the very office that produces the US government’s authoritative synthesis of that science.

How the program got here

The Times reports that the administration last spring dismissed hundreds of scientists and experts who had been working on the next update of the assessment, hollowing out the author pool that would normally feed Wielicki’s office. President Trump has publicly called climate change a “hoax,” and his administration has dismantled climate initiatives across the federal government. Russell T. Vought, the White House budget director, has separately called for overhauling the Global Change Research Program, arguing its findings have been used to justify environmental lawsuits that constrained government actions. The Wielicki appointment is consistent with that broader posture.

A wider pattern of reshaping independent federal bodies

The climate-report personnel move came in the same week that the Trump administration moved aggressively against another independent federal body. According to CNBC, the Associated Press and The Guardian, the president removed the last three members of the Election Assistance Commission (EAC) — two Democrats by email and one Republican by way of a forced resignation — months before the November midterm elections. The EAC was created under the Help America Vote Act after the disputed 2000 election; it distributes federal election-security grants, maintains the national mail voter registration form, certifies voting machines against federal standards and advises state and local officials.

The White House justified the EAC purge by citing a recent Supreme Court ruling, described in the AP report as the “Slaughter decision,” that the president has authority to remove members of independent agency boards without cause. The Guardian notes that election-law scholars consider the ruling’s reach into bipartisan bodies such as the EAC untested, because Congress deliberately built the commission around an even partisan split. With no commissioners in place, the EAC cannot vote to take formal action — including updating voting standards or the federal registration form — and any replacements would again require Senate confirmation, a process that, as the Guardian points out, could drag well past the midterms.

Why the climate-reporting decision matters

The stakes are unusually concrete because the National Climate Assessment is not a think-tank paper. Its regional projections are routinely cited in state climate plans, in utility integrated resource plans, in municipal resilience-bond applications and in federal cost-benefit analyses. If the next assessment softens the framing of risk or narrows the range of projected impacts, the second-order effects cascade into planning, insurance pricing and tort litigation. That is the link Russell Vought explicitly drew when he criticised the program’s findings for being used to justify environmental lawsuits, the Times reports.

There is also a precedent question. Wielicki’s public posture, as described by the Times, is at odds with the mainstream consensus of bodies such as the Intergovernmental Panel on Climate Change, which France’s High Council for Climate drew on in a separate report the same week. RFI reports that the independent French watchdog, the HCC, said mainland France and Corsica have warmed by 2.2 °C between 1900–1930 and 2016–2025, with summer temperatures up 2.9 °C, and that without rapid decarbonisation heatwaves could become five times more frequent by 2050 and ten times by 2100. The juxtaposition underlines how a US report whose author is sceptical of mainstream climate science would stand relative to peer assessments from allied governments.

Where the reporting diverges

The sources available here agree on the basic facts of Wielicki’s appointment and the EAC purge, but they differ in emphasis. The New York Times frames the climate-reporting story primarily as a question of scientific authority and the gutting of an expert pipeline. The Guardian and CNBC, covering the EAC story, foreground the election-integrity and democratic-accountability implications. The Associated Press adds a layer of legal analysis, quoting the Center for Election Innovation & Research’s David Becker as saying the EAC purge “doesn’t really change anything about how our elections will be run” — a counterweight to Democratic claims of an existential threat. Readers looking for a unified administration rationale should note that the White House’s stated justification in both stories — citing the Slaughter decision and alleging misalignment with the administration’s priorities — is identical in structure across the two cases, even though the underlying agencies have very different mandates.

Different angles and stakeholders

Climate scientists and former assessment authors, already sidelined by last spring’s dismissals, are the clearest losers in the near term; their loss of a publishing platform also weakens the evidentiary base used by plaintiffs in climate-related litigation, which is the dynamic Vought named. Communities reliant on federal projections for adaptation funding — coastal counties, tribal nations, agricultural regions — are exposed if the next report narrows the risk picture. Beneficiaries of the shift are largely actors who prefer less prescriptive federal climate guidance: fossil-fuel interests, certain state governments contesting federal climate authority, and litigants seeking to challenge regulations grounded in assessment findings. The political counterweight, at this point, is Congressional: the assessment is required by law, and Wielicki’s office cannot unilaterally rewrite the statute authorising it.

What to watch next

Three near-term indicators will tell readers whether the Wielicki appointment is a symbolic reset or a substantive redirection of US climate reporting. First, whether the administration names a replacement author team for the next assessment, or attempts to publish an update with Wielicki’s office as the principal voice. Second, whether Wielicki’s prior published output, podcasts and social-media statements are formally disclosed and reviewed against federal scientific-integrity standards. Third, whether Congressional committees with oversight of the Global Change Research Program demand testimony on Vought’s stated overhaul plans. Each of those would be a discrete, searchable event that will move the story without requiring speculation about longer-term climate trajectories.

On the parallel EAC track, readers should watch whether the president nominates replacement commissioners before the November midterms — the AP reports it was not clear he intends to — and how state election officials adapt in the absence of a functioning federal commission. The Supreme Court’s Slaughter ruling, by the administration’s own account, is the legal hinge on which both the climate-office appointment and the EAC purge now rest; any subsequent litigation testing its scope will be the next inflection point.