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WASHINGTON — In a single month in 2017, the Trump administration’s Environmental Protection Agency blocked scientists from speaking at a climate change conference, its Interior Department forwarded a policy letter to U.S. Customs and Border Protection only after deleting concerns from biologists about a border wall’s effects on wildlife, and the F.B.I. issued a crime report that omitted dozens of tables of data on homicides and arrests.

That October was fairly typical for the Trump administration, according to a new report out of New York University, led by Preet Bharara, a former United States attorney, and Christine Todd Whitman, who led the E.P.A. for George W. Bush.

Every president over the past two decades has, to some degree, undermined research and injected politics into science, the report said. But, it concluded, “Now, we are at a crisis point, with almost weekly violations of previously respected safeguards.” The report calls for stringent new standards to enshrine scientific independence.

The study, to be formally released on Thursday, follows reports that President Trump’s acting chief of staff, Mick Mulvaney, pressured the commerce secretary to rebuke weather forecasters who appeared to contradict the president after he erroneously claimed a recent hurricane could affect Alabama. Earlier this summer a State Department intelligence analyst resigned in protest after the White House tried to edit scientific testimony about climate change and then blocked it from being entered into the permanent Congressional Record. For months the White House debated a plan to publicly question the established scientific conclusions about the severity of climate change.