In a Senate hearing Tuesday, NIH director dismissed concern about research chaos.

Jay Bhattacharya, director of the National Institutes of Health under the Trump administration, appeared before the Senate Committee on Health, Education, Labor, and Pensions (HELP) Tuesday. In the wide-ranging hearing, Bhattacharya defended the chaotic and disruptive cuts at the institutes he helms while carefully wording responses related to vaccines—seemingly to avoid contradicting his boss, anti-vaccine Health Secretary Robert F. Kennedy Jr.

As Bhattacharya testified, Sen. Bernie Sanders (I-Vt.), the HELP committee’s ranking member, released a report outlining the state of the NIH. The report concluded that the Trump administration is “failing American patients,” and “destroying medical research through cuts to research grants, terminations of clinical trials, and the chaos it has created.”

Since Trump took office, the NIH has terminated or frozen hundreds of millions of dollars for research grants, including $561 million in grants to research the four leading causes of death in America, the report found.

Specifically, Bhattacharya oversaw the disruption of: 116 grants for cancer research, totaling $273 million; 71 grants to study heart disease, totaling $111 million; 65 grants for Alzheimer’s disease, totaling $94 million; and 68 grants for diabetes, totaling $83 million. The report also identified at least 304 clinical trials that were defunded, including 69 that were for children.