Who will be in Trump's administration? A breakdown of the people who will shape key policies over the next 4 years

Susie Wiles is set to make history as the country's first female chief of staff. A veteran Florida strategist who has led Trump's political operation for nearly four years, Wiles is seen as loyal and supremely capable.

A grandmother who keeps a relatively low public profile, Wiles is Trump's only campaign manager to have lasted an entire election cycle, the New York Times reported. Not only did she help the president-elect expand his base and run a more professional campaign, she also assisted lawyers on his various criminal and civil cases. She has a proven ability to manage Trump's unpredictable personality, which will be crucial as she takes on what some consider the second most powerful job in Washington, behind the presidency itself.

"Susie is tough, smart, innovative and is universally admired and respected," Trump said when announcing her role. Chris LaCivita, co-campaign manager, described her as "loyal and honest as the day is long."

Come January, Wiles will likely have to balance the demands various big personalities, including Elon Musk to Robert F. Kennedy Jr. Trump tore through four chiefs of staff during his first term, with one of them, Gen. John Kelly, describing it as the worst job he's ever had.

More traditional Republicans and MAGA diehards alike seem to think that Wiles, with her political sharpness and close ties to the Trump family, will be a more durable choice.

Trump nominated Rep. Elise Stefanik of upstate New York to fill the role of UN ambassador, his first Cabinet pick. She is currently the fourth-ranking Republican in the House and was a loyal Trump surrogate during the campaign.

Stefanik, the 40-year-old chair of the House Republican Conference, cemented her status as a Trump ally during his 2019 impeachment hearings. She's a vocal supporter of Israel and took a leading role in the congressional hearings that led multiple top university presidents to resign over their handling of protests against the war in Gaza. She lacks, however, significant foreign policy and national security experience, the New York Times reported.

"Elise is an incredibly strong, tough, and smart America First fighter," Trump said in a statement confirming the pick. In a statement to the New York Post, Stefanik said she was "deeply humbled" to accept the nomination.

Should the Senate confirm Stefanik, as it is likely to do, there will be a special election to fill her congressional seat.

Trump has tapped Thomas Homan to serve as his administration's "border czar." Homan, 62, was a senior immigration official during Trump's first term — he served as the acting director of Immigration and Customs Enforcement.

Homan will oversee the nation's borders, as well as its maritime and aviation security. A former police officer and border patrol agent, he has extensive experience in immigration enforcement.

Trump made immigration enforcement a centerpiece of his campaign and has promised to pursue the country's largest mass deportation to date. Last month, Homan told "60 Minutes" that worksite raids to target unauthorized employees would pick back up under a Trump presidency.

The president-elect announced Homan's role on Truth Social: "I've known Tom for a long time, and there is nobody better at policing and controlling our Borders."

Homan's role does not need Senate confirmation.