Republicans and Democrats on the congressional committee planning next month's inauguration squabbled Tuesday morning over the election results, with Republicans voting against a measure from House Majority Leader Steny Hoyer acknowledging Biden's victory.

"I made a motion that the committee notify the American people that it is preparing for the inauguration of Joseph Biden and Kamala Harris, and in consultation with them and health experts are doing so to protect the health of our people," Hoyer told reporters after the meeting. "That motion was defeated three to three."

All three Republicans on the panel -- Senate Majority Leader Mitch McConnell, Senate Rules Committee Chairman Roy Blunt and House Minority Leader Kevin McCarthy -- voted against the measure, while Democrats on the panel -- Hoyer, House Speaker Nancy Pelosi and Sen. Amy Klobuchar, D-Minn. -- voted in favor.

Even as they refuse to acknowledge Biden's victory, Republicans called Hoyer's move a stunt that has no bearing on planning the inauguration: They are already working with Biden's inaugural committee, and the measure wasn't relevant to the day's meeting.

“It is not the job of the Joint Congressional Committee on Inaugural Ceremonies to get ahead of the electoral process and decide who we are inaugurating. The JCCIC is facing the challenge of planning safe Inaugural Ceremonies during a global pandemic," Blunt said in a statement. "I would hope that, going forward, the members of the JCCIC would adhere to the committee’s long-standing tradition of bipartisan cooperation and focus on the task at hand.”

-ABC News' Benjamin Siegel

Dr. Rochelle Walensky, chief on infectious diseases as Massachusetts General who was tapped as Biden's pick to lead the Centers for Disease Control and Prevention, said her work on the HIV/AIDS pandemic brought her to this moment and said she is “honored” to serve an administration that will let science lead.

"I've dedicated my career ever since to researching and treating infectious diseases, and to ending the HIV/AIDS crisis for good. Now a new virus is ravaging us. It's striking hardest once again at the most vulnerable: the marginalized, the underserved," she said. "The pain is accelerating. Our defenses have worn down. We are losing life and hope at an alarming rate."

Walensky said she never anticipated taking on the role in government but compared the nation to a dying patient, said it's her calling as a doctor to respond.

"Every doctor knows that when a patient is coding, your plans don't matter. You answer the code. And when the nation is coding, if you are called to serve, serve. You run to take care of people, to stop the bleeding, to stabilize, to give them hope and a fighting chance to come back stronger," she said.

Director of the National Institute of Allergy and Infectious Diseases Dr. Anthony Fauci, who will stay on Biden's COVID-19 equity task force and take on the elevated role of chief medical adviser, appeared virtually at Biden's rollout and expressed support for Biden's initiatives around masks and vaccinations in his first 100 days in office.

"I believe, as you do, that in the fight against this pandemic, we must lead with science and that a key piece of our ongoing work is communicating consistently with the American people," Fauci began.

"Whether it's maintaining social distancing and not congregating indoors, or the 100-day challenge you described on masking or to get as many people vaccinated as possible, these actions are bold, but they are doable and essential to help the public avoid unnecessary risks, to help us save lives, reopen schools and businesses and to eventually beat the pandemic," he continued.

Acknowledging he's dealt with many public health crises in his career, Fauci said the COVID-19 pandemic is "the toughest one we have ever faced as a nation," and repeated Biden's warnings that a dark winter is ahead.

"The road ahead will not be easy. We have got a lot of hard and demanding work to do in the next year, but as we have done during previous crises, I also know we can get through this pandemic together as a nation," Fauci added, thanking Biden for the opportunity to serve in this capacity.

Fauci explained he wasn't able to attend the event in-person because his colleague at the NIAID is receiving the Nobel Prize in medicine Tuesday.

Biden's nominee for surgeon general, Dr. Vivek Murthy, who served in the same role in Obama administration, reminded in his remarks that COVID-19 is not the only health crisis devastating families and shortening life spans in America while warning that even with the best policies, the nation must overcome the fear and distrust that many are feeling amid the pandemic.

"In my new expanded role, I will work to bring a health focus to our policies across government so that our schools, our workplaces and our communities can be forces for strengthening our health and wellbeing, but the truth is that the very best policies, and even the best vaccines and treatments, will not heal our nation unless we also overcome the fear, anxiety, anger and distrust that so many Americans are feeling right now," Murthy said.

"So more than anything, I will come to this role as a doctor, one who learned the most important lessons about medicine not in medical school, but from the clinic that my parents opened when they first came to America as immigrants decades ago," he added.

Drawing from personal experience, Murthy went on to say he is "endlessly grateful to serve one of the few countries in the world where the grandson of a poor farmer in India could be asked by the president-elect to look out for the health of an entire nation."

Former New Jersey governor and ABC News political contributor Chris Christie, criticized President Donald Trump and his allies' efforts to overturn President-elect Joe Biden's election victory during "This Week"'s Powerhouse Players Roundtable discussion on Sunday.

"The legal theory put forward by his legal team and by the president is an absurdity," Christie said. "The reason why the Supreme Court didn't take it is because it's an absurd idea to think that any state or any number of states, no matter how good they are, can challenge another state's right to run the election as they see fit. And, also, there's no evidence," he added.

Christie also denounced what he called were "attacks" by the president on "decent Republican governors."

"What's gotten even worse ... is the attacks by the president on good, hardworking, decent Republican governors," he said. "He's calling them corrupt, and also telling people things that aren't true," Christie said, mentioning the president's recent comments about Arizona Gov. Doug Ducey and Georgia Gov. Brian Kemp.

The president tweeted in November that Kemp was "hapless" and should "overrule his obstinate secretary of state," Brad Raffensperger -- also a Republican backer of Trump -- after the latter has refused to intervene to help Trump.

"The governor's done nothing," Trump also said in a Fox News interview. "He's done absolutely nothing. I'm ashamed that I endorsed him."

On Dec. 12, the president tweeted, "Who is a worse governor, @BrianKempGA of Georgia or @dougducey of Arizona???" as part of a series of tweets blasting both governors since the presidential election.