Science is at the core of a healthy democracy. But for years, presidential administrations have, in differing ways, sidelined scientific evidence and attacked scientific integrity.
Due to the large number of attacks on science we’re seeing from the second Trump administration, we are currently providing regular summaries of documented attacks.
- In the Dark: Trump Administration Continues to Cancel and Suppress Information (October 20, 2025)
- As Scientists Raise the Alarm, Trump Administration Attacks Continue (September 15, 2025)
- From the Courtroom to the Internet, the Fight Over Federal Science Is On (July 24, 2025)
- Science Under Fire in Washington (June 12, 2025)
- The State of Science at 100 Days: Co-Opted, Hindered, and Undermined (May 8, 2025)
- A Backward March: Another Month of Attacks on Federal Science (April 2, 2025)
- A Hundred Attacks and Counting: What Happened to Federal Science in February (March 12, 2025)
- How Science Has Fared in the First Two Weeks of the New Trump Administration (January 30, 2025)
Below is the list of documented attacks on science that occurred under the four previous administrations. They include disappearing data, silenced scientists, suppressed studies, and other assaults on science-based policy. More information on these attacks can be found in our peer-reviewed study and in our data repository.
Attacks on science
Political Pressure Sidelined HHS Efforts to Increase US Breastfeeding Rates
Department of Health and Human Services, bowing to political pressures, restricted important public health messages about breastfeeding from reaching Americans on at least two occasions.
Abstinence-Only Sex Education Curriculum
Federally funded abstinence-only programs use curricula that contain false, misleading or distorted information about reproductive health.
CDC Experts Prevented from Presenting at International AIDS Conference
US scientists lost a valuable opportunity to communicate and collaborate with researchers around the world when the Bush administration’s decided to drastically limit its participation in the 2004 International AIDS Conference in Bangkok.
Timber Industry ‘Gets What They Want’, Birds Don’t Get What they Need
Department of Interior tampered with and ultimately reversed the findings of government biologists regarding the threatened status of the marbled murrelet
HHS Seeks Right of Approval Over Experts on WHO Health Panels
In April 2004, the Department of Health and Human Services implemented a new policy requiring that an HHS official approve all experts participating on UN scientific panels, including the World Health Organization.
Press "Minders" Required at Scientists’ Interviews
Federal agency public affairs offices have used "minders" --officials who are assigned to listen in on scientists’ media interviews -- to enforce media policies more restrictively over some climate change scientists.
Forest Brochure Misrepresents Science to Promote Logging Initiative
In 2004 the U.S. Forest Service (USFS) exaggerated the impact of forest fires on spotted owl habitat in an attempt to expand old-growth logging in the Sierra Nevada.
Fogarty International Center Advisory Board
Qualified nominees to the advisory board of NIH’s Fogarty International Center were rejected by the Bush administration for political reasons.
Selenium Standards Misinterpret Key Research
In late 2004, the Environmental Protection Agency (EPA) proposed new selenium standards that scientists say are much too high.
Political Appointee Edits Science on Greater Sage Grouse
Julie MacDonald, a deputy assistant secretary of the interior with no background in wildlife biology, changed the scientific content of a report examining the vulnerability of the greater sage grouse, a highly threatened ground bird of the American West.
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