Jim Jones, the head of the food division at the US Food and Drug Administration who oversaw the agency’s banning of the food dye Red No. 3 earlier this year, stepped down on Monday, citing widespread cuts across the agency that he said will make it hard to implement the types of changes the Trump administration is seeking,

In his resignation letter, obtained by Bloomberg News, Jones cited “indiscriminate” layoffs to 89 staff members, including key technical experts. “I was looking forward to working to pursue the department’s agenda of improving the health of Americans by reducing diet-related chronic disease and risks from chemicals in food,” Jones wrote.