President Trump calls for a “review” of an updated judges’ manual covering scientific evidence after a climate science chapter is withdrawn. Trump says the manual has been “totally discredited” and argues that it reflects political influence rather than neutral, reliable science. The dispute follows the federal judiciary’s decision in February to remove a chapter on climate science from the newest edition of the “Reference Manual on Scientific Evidence.”

The manual is published by the Federal Judicial Center, with cooperation from the National Academies of Sciences, Engineering, and Medicine, and draws on guidance intended to help judges evaluate complex scientific and technical information. While the guidance is not binding, it is used to assist judges in identifying issues commonly disputed and in assessing evidence based on scientifically sound knowledge.

Trump’s request centers on allegations from conservative attorneys general that the climate chapter presented a single preferred view of climate science and attribution. Authors of the chapter disputed those claims in a letter, saying it presented anthropogenic climate change as a settled scientific finding while also describing uncertainty in other areas. The announced review is described by Trump as being handled by federal officials tied to suspension and debarment.