WASHINGTON  — Dow Chemical is pushing a Trump administration open to scrapping regulations to ignore the findings of federal scientists who point to a family of widely used pesticides as harmful to about 1,800 critically threatened or endangered species.

Lawyers representing Dow, whose CEO is a close adviser to Trump, and two other manufacturers of organophosphates sent letters last week to the heads of three of Trump’s Cabinet agencies. The companies asked them “to set aside” the results of government studies the companies contend are fundamentally flawed.

Dow Chemical wrote a $1 million check to help underwrite Trump’s inaugural festivities, and its chairman and CEO, Andrew Liveris, heads a White House manufacturing working group.

The industry’s request comes after EPA Administrator Scott Pruitt announced last month he was reversing an Obama-era effort to bar the use of Dow’s chlorpyrifos pesticide on food after recent peer-reviewed studies found that even tiny levels of exposure could hinder the development of children’s brains. In his prior job as Oklahoma’s attorney general, Pruitt often aligned himself in legal disputes with the interests of executives and corporations who supported his state campaigns. He filed more than a dozen lawsuits seeking to overturn some of the same regulations he is now charged with enforcing.

Pruitt declined to answer questions from reporters Wednesday as he toured a polluted Superfund site in Indiana. A spokesman for the agency later told AP that Pruitt won’t “prejudge” any potential rule-making decisions as “we are trying to restore regulatory sanity to EPA’s work.”

The letters to Cabinet heads, dated April 13, were obtained by The Associated Press. As with the recent human studies of chlorpyrifos, Dow hired its own scientists to produce a lengthy rebuttal to the government studies.

Over the past four years, government scientists have compiled an official record running more than 10,000 pages indicating the three pesticides under review — chlorpyrifos, diazinon and malathion — pose a risk to nearly every endangered species they studied. Regulators at the three federal agencies, which share responsibilities for enforcing the Endangered Species Act, are close to issuing findings expected to result in new limits on how and where the highly toxic pesticides can be used.