Trump transition live updates: Trump announces his press secretary

Vice President-elect JD Vance has already been working the phones reaching out to senators trying to gauge support for Matt Gaetz -- who Trump named for the attorney general role, according to three sources with knowledge of the calls.

Matt Gaetz has also been making calls to senators, sources said.

The calls from Vance underscore ABC News' reporting that he is expected to be the "eyes and ears" for Trump in Congress.

Also, the House Ethics Committee, which sources said was preparing to meet this week to deliberate over whether to release a final report on Gaetz -- is not expected to meet Friday, per two sources.

-ABC News' Rachel Scott

After wishing Robert F. Kennedy Jr. congratulations for his nomination as health secretary, former Democratic presidential candidate and progressive Marianne Williamson told ABC News the Democratic Party has a "profound lack of understanding of people’s health concerns."

"I agreed with and campaigned on a lot of things Bobby Kennedy has to say, just as I have disagreed with other things," Williamson said.

"But I recognized the malicious way the system sought to remove him from the conversation, due to a problem not within him but within it," she added.

Williamson said that she suggested the Democratic Party "announce its own root cause food and health platform as an alternative" after Kennedy endorsed Trump.

"I offered the policies I had developed during my own campaign. Their disinterest displayed a profound lack of understanding of people’s health concerns, and how proactively creating health is a critically needed complement to treating the symptoms of sickness," Williamson said.

Trump made another cabinet announcement Thursday evening, saying North Dakota Gov. Doug Burgum will be tapped to be the Secretary of the Interior.

Speaking of energy policy, Trump said, "We're going to slash energy costs. We're going to get your energy bills in half, and that's going to bring down the cost."

Teasing the announcement, which he said will formally come Friday, Trump revealed Burgum will lead the Department of the Interior.

"He's going to head the Department of Interior and he's going to be fantastic," Trump said.

During his address at the America First Policy Institute's annual gala, Trump praised his newly announced cabinet members, Elon Musk, Robert F. Kennedy Jr., Tulsi Gabbard and Vivek Ramaswamy.

"He launched a rocket three weeks ago, and then he went to Pennsylvania to campaign because he considered this more important than launching rockets that cost billions of dollars. Elon Musk, what a job he does," Trump said of Musk, who he appointed to spearhead the new Department of Government Efficiency with Ramaswamy.

Speaking of RFK Jr., who was tapped to lead the Department of Health and Human Services, Trump said, "I guess if you like health and if you like people that live a long time, it's the most important position."