Secretary of Health and Human Services Robert F. Kennedy Jr. defended President Donald Trump’s executive order spurring the domestic production of the weedkiller glyphosate, as his Make America Healthy Again movement reels from the president’s embrace of the chemical they despise.

Trump on Wednesday night signed an executive order invoking the Defense Production Act to compel the domestic production of elemental phosphorus and glyphosate-based herbicides. Glyphosate is the chemical in Bayer-Monsanto’s

Roundup and is the most commonly used weedkiller for a slew of U.S. crops. Trump, in the order, said shortages of both phosphorus and glyphosate would pose a risk to national security.

Kennedy backed the president in a statement to CNBC Thursday morning.

“Donald Trump’s Executive Order puts America first where it matters most — our defense readiness and our food supply,” he said. “We must safeguard America’s national security first, because all of our priorities depend on it. When hostile actors control critical inputs, they weaken our security. By expanding domestic production, we close that gap and protect American families.”