Election 2024 updates: Trump begins selecting cabinet positions

Robert F. Kennedy Jr. indicated over the weekend that he would fire 600 employees at the National Institutes of Health, replacing them with a new cohort of workers as he seeks to dramatically reshape America's health agencies.

Speaking at the Genius Network Annual Event in Scottsdale, Arizona, Kennedy described his role vetting people for Donald Trump's new administration.

"We need to act fast, and we want to have those people in place on Jan. 20, so that on Jan. 21, 600 people are going to walk into offices at NIH and 600 people are going to leave," Kennedy said, according to a video of his remarks posted on YouTube.

RFK Jr. is expected to take a major role overseeing public health under Trump's administration.

President-elect Trump has selected former Rep. Lee Zeldin to serve as EPA administrator, the second New Yorker to be selected to the cabinet.

"It is an honor to join President Trump's Cabinet as EPA Administrator. We will restore US energy dominance, revitalize our auto industry to bring back American jobs, and make the US the global leader of AI. We will do so while protecting access to clean air and water," Zeldin said in a social media post.

In a statement, Trump said that Zeldin "has been a true fighter for America First politics."

"He will ensure fair and swift deregulatory decisions that will be enacted in a way to unleash the power of American businesses, while at the same time maintaining the highest environmental standards, including the cleanest air and water on the planet," Trump said. "He will set new standards on environmental review and maintenance, that will allow the United States to grow in a healthy and well-structured way."

Donald Trump is naming longtime adviser Stephen Miller, an immigration hard-liner, to be the deputy chief of policy in his new administration.

Vice President-elect JD Vance posted a message of congratulations on Monday to Miller on X and said, "This is another fantastic pick by the president."

President-elect Donald Trump selected Rep. Elise Stefanik to be his U.S. ambassador to the United Nations, multiple Trump officials told ABC News.

"I am honored to nominate Chairwoman Elise Stefanik to serve in my Cabinet as U.S. Ambassador to the United Nations. Elise is an incredibly strong, tough, and smart America First fighter," President-elect Donald Trump said in a statement to ABC News.