NAS Removes Climate Chapter From Judges Manual After Trump Pressure
The National Academy of Sciences removed a climate science chapter from its Reference Manual on Scientific Evidence after pressure from President Donald Trump and Republican officials who falsely characterized the peer-reviewed work as “biased,” “fraudulent,” and “misleading.” The chapter, titled “Reference Guide on Climate Science,” had been included for the first time in the 2025 edition and covered the greenhouse effect, atmospheric cycling, attribution science, and peer-reviewed research to assist judges in reasoning through cases involving complex scientific topics.
Trump and dozens of state attorneys general attacked the chapter in early 2026, prompting the Federal Judicial Center to remove it in February. The NAS subsequently announced the chapter would remain offline pending an “independent review,” claiming questions about development processes warranted examination. This decision subordinates scientific evidence to political pressure, despite the chapter undergoing rigorous peer review from external scientists, judges, and National Academies staff according to the same standards applied to all manual sections.
Authors Jessica Wentz and Radley Horton, both from Columbia University, defended their work as science-based and properly vetted through extensive external review. Their chapter presented established climate science findings to serve the judiciary in complex litigation. The removal demonstrates how Trump’s federal attack on the National Academy of Sciences extends beyond investigation to direct suppression of scientific guidance that contradicts his interests and those of fossil fuel allies.
The action exemplifies Trump’s systematic assault on independent institutions and scientific authority. By weaponizing accusations of bias against peer-reviewed climate science, Trump manufactures pretexts for erasing inconvenient research from judicial reference materials, obstructing judges’ access to credible scientific evidence necessary for sound legal reasoning on environmental cases. The capitulation by the NAS and Federal Judicial Center signals institutional vulnerability to authoritarian pressure campaigns disguised as procedural reviews.