President-elect Donald Trump will nominate former presidential candidate and anti-vaccine activist Robert F. Kennedy Jr. to lead the Department of Health and Human Services.

The pick, which will roil many public health experts, comes after Trump promised to let Kennedy “go wild” with health and food policy in his administration after Kennedy dropped his own presidential bid to endorse the now-president-elect. It’s also a sign of the opening Trump sees after he scored a decisive electoral victory and Republicans won a comfortable majority in the Senate.

“For too long, Americans have been crushed by the industrial food complex and drug companies who have engaged in deception, misinformation, and disinformation when it comes to Public Health,” Trump posted on X. “The Safety and Health of all Americans is the most important role of any Administration, and HHS will play a big role in helping ensure that everybody will be protected from harmful chemicals, pollutants, pesticides, pharmaceutical products, and food additives that have contributed to the overwhelming Health Crisis in this Country.”

Kennedy, 70, may still face a steep slope to confirmation after his years of touting debunked claims that vaccines cause autism, written a book accusing former National Institutes of Health official Anthony Fauci of conspiring with tech mogul Bill Gates and drugmakers to sell Covid-19 vaccines and said regulatory officials are industry puppets who should be removed.

Sen. John Cornyn (R-Texas) said Kennedy will be treated like all other nominees.

“I don’t have any preconceived notion about it,” Cornyn said.

When asked if vaccine positions might make confirmation difficult: “I’m sure it will come up.”

House Minority Leader Hakeem Jeffries said it’s up to the Senate to confirm or reject Kennedy but was skeptical that he was the right choice.

“Is RFK Jr. the best qualified person in the United States of America to lead us forward as we grapple with an enormous amount of health challenges in this country? The answer is clearly he is not,” Jeffries said.

In recent weeks, Kennedy has hit the media circuit to say he isn’t taking vaccines away from anyone.

“I’m going to make sure scientific safety studies and efficacy are out there, and people can make individual assessments about whether that product is going to be good for them,” he told MSNBC the day after Trump’s win.

He also claimed the Trump administration would recommend against fluoride in drinking water, which is added to prevent cavities. Kennedy has said it’s “almost certainly” causing a loss of IQ in children, as some studies have found.

Ursula Perano and Ben Leonard contributed to this report.