Biden and Harris formally introduced newly nominated and appointed members of their administration from Wilmington, Delaware, Friday afternoon, showing off several familiar faces, be it from the Obama administration or from Capitol Hill.

For director of the White House Domestic Policy Council, a position which does not require Senate confirmation, Biden picked Susan Rice. Rice served as U.S. ambassador to the United Nations and later as national security adviser in the Obama administration.

In her remarks, Rice laid out the path of her ancestors on both sides who overcame adversity -- a paternal great grandfather who was born a slave in South Carolina and maternal grandparents who immigrated from Jamaica with no education and worked to send their children to college, leading to her mother’s role in creating the Pell Grant.

“Now at the foot of yet another bridge between crisis and opportunity, I'm honored and excited to take on this role. Joe Biden and Kamala Harris's vision for our future is expansive but achievable," Rice said, stressing her excitement to serve again and the need to develop policies that break down racial barriers that hold all Americans back.

Rep. Marcia Fudge, who has represented Ohio's 11th Congressional District for the last 12 years has been tapped for secretary of Housing and Urban Development and talked about the importance of housing in America and the need to give people hope amid  America’s ongoing crisis.

“Perhaps most importantly of all, we will help people believe once again that their government cares about them, no matter who they are. That we understand their problems, as the president-elect often recalls his father's words,” she said.

Biden's nominee for secretary of agriculture, Tom Vilsack, seemed to address some of the criticism of his previous tenure at USDA (he held the same Cabinet position he's nominated for throughout the Obama administration) by promising to deal with systemic inequities.

Vilsack also mentioned his support for Rep. Jim Clyburn's 10/20/30 plan, an effort the South Carolina congressman said aims to help counties that had a poverty level of more 20% for more than three decades. Those communities would receive at least 10% of federal funds from a specific program. When asked in 2019 if he considered the measure a form of reparations, Clyburn said the measure "absolutely" is.

Biden's pick for secretary of veterans affairs, Dennis McDonough, former President Barack Obama's White House chief of staff, pledged to make the department more inclusive to all veterans, particularly women, veterans of color and members of the LGBTQ community.

Biden's appointed Katherine Tai to U.S. trade representative, who began by recalling her parents' immigrant story of her father, a researcher at Walter Reed, and her mother, who still works at the National Institutes of Health developing treatments for opioid addictions. She also stressed the role trade can play to create opportunities and lift people out of poverty and the need to rebuild relationships around the globe.

-ABC News' Molly Nagle, John Verhovek and Beatrice Peterson

Rep. Bill Pascrell, D-N.J., has called on House Speaker Nancy Pelosi to refuse to seat those Republicans who signed on to a brief supporting the Texas lawsuit seeking to throw out millions of votes when the next Congress is sworn in next year.

"Stated simply, men and women who would act to tear the United States government apart cannot serve as Members of the Congress," he said. "These lawsuits seeking to obliterate public confidence in our democratic system by invalidating the clear results of the 2020 presidential election undoubtedly attack the text and spirit of the Constitution, which each Members swears to defend."

“The House still retains the right to decide who is seated,” Pelosi said in 2018, amid concerns of fraud impacting the election in North Carolina's Ninth Congressional District. “Any member-elect can object to the seating or the swearing in of another member-elect, and we’ll see how that goes.”

-ABC News' Benjamin Siegel

Biden is introducing more nominees and picks for the incoming administration from Wilmington, Delaware, and while the resurgence of Obama-era officials has some Democrats worried the president-elect is relying so heavily on his longtime allies, Biden argued the choice behind each of his picks Friday.

"Vice President-Elect Harris and I knew we’d have our work cut out for us when we got elected, but we also knew we could build a team that would meet this unique and challenging moment in American history. Some are familiar faces. Some are new in their roles," Biden said. "Above all, they know how government should and can work for all Americans."

For secretary of agriculture, Biden’s nominating Tom Vilsack, who served in the same post throughout the Obama administration. Vilsack previously served two-terms as governor of Iowa.

For secretary of Housing and Urban Development, Biden chose Rep. Marcia Fudge, who has represented Ohio's 11th Congressional District for the last 12 years. If confirmed, she will be the first woman to lead the department in more than four decades.

For secretary of veterans affairs, Biden is nominating former President Barack Obama’s former chief of staff, Denis McDonough. McDonough also served as deputy national security adviser and chief of staff of the National Security Council during the Obama administration.

Biden picked Katherine Tai for U.S. trade representative. Tai currently serves as the chief lawyer on trade for the Ways and Means Committee in the House of Representatives and previously was chief counsel for China trade enforcement in the office of the U.S. trade representative.

For director of the White House Domestic Policy Council, Biden has appointed Susan Rice. Rice served as U.S. ambassador to the United Nations and later as national security adviser in the Obama administration.

Before introducing more Cabinet nominees and administration picks to the public on Friday, Biden opened with a statement on Pfizer and BioNTech’s coronavirus vaccine, which the Food and Drug Administration is expected to approve for emergency use at any time.

"I want to make it clear to the public: You should have confidence in this. There is no political influence,” Biden said.

Biden’s remarks come as sources familiar with the matter tell ABC News White House chief of staff Mark Meadows in a phone call on Friday suggested to FDA Commissioner Dr. Stephen Hahn that his job could be on the line if his agency doesn't authorize the emergency use for the vaccine by the end of the day.

-ABC News’ Katherine Faulders and John Santucci

Incoming White House Senior Adviser Louisiana Rep. Cedric Richmond, appeared on CBS' "Face the Nation" on Sunday, but revealed very little about the incoming Biden transition plans for vaccine distribution or dealing with the newly announced investigation of Hunter Biden’s taxes. However, Richmond stressed in his interview that Republicans were very aware that Biden would be president on Jan. 20.

When asked about congressional Republicans largely refusing to recognize President-elect Biden’s victory, Richmond pushed back, saying it was a small portion of the party afraid of Trump.

"They recognize Joe Biden's victory. All of America recognizes Joe Biden's victory. This is just a small portion of the Republican conference that are appeasing and patronizing the President on his way out because they are scared of his Twitter power and other things. And so when it's time to govern, if we can't cooperate -- if Republicans won't meet us halfway, we will go to the American people, and we will continue to push our agenda. But this country is in far too much turmoil. And this pandemic, the economic aspects and health aspects really caused for America to get on one page -- solve this crisis and start to move forward. So -- we're not going to let them slow us down,” he said.

"I talk to Republican members of Congress all the time, and they say one thing privately, they say another thing publicly. But the one thing I will tell you is they realize he lost this election," Richmond added.

- Molly Nagle