The House will deliver the impeachment article against former President Trump to the Senate on Monday, formally launching trial proceedings next week, Senate Majority Leader Chuck Schumer, D-N.Y., said on the Senate floor Friday.

Schumer's announcement follows a request from Senate Minority Leader Mitch McConnell, R-Ky., to delay the trial until February to give Trump and his still-forming legal team time to prepare a defense.

Trump will be the first former president to face an impeachment trial. Some Senate Republicans have argued that the trial would be unconstitutional because the 45th president is no longer in office, a stance that could trigger a Senate debate and vote on the validity of the trial in the coming weeks.

"I have spoken to Speaker Pelosi who informed me that the articles will be delivered to the Senate on Monday," Schumer said.

"The Senate will conduct a trial of the impeachment of Donald Trump. It will be a full trial, it will be a fair trial," he added, without details on the length or format of the proceedings.

-ABC News' Benjamin Siegel, Katherine Faulders and Allison Pecorin

While White House press secretary Jen Psaki acknowledged that Biden's goal of getting 100 million Americans vaccinated against COVID-19 within the first 100 days of his presidency "was bold at the time" it was set and "continues to be," she insisted their efforts won't stop there.

"When we reach that goal, and we're confident we will, we're going to build from there. So we're not packing our bags at 100 million shots in the arms of Americans," Psaki told ABC News chief anchor George Stephanopoulos in an exclusive interview Friday on "Good Morning America."

"We want to make sure that people know that we're going to hold ourselves accountable and we're going to do everything to make sure we're getting as many people vaccinated as possible," she added.

Addressing the criticism from some congressional Republicans on Biden's proposed $1.9 trillion stimulus package, Psaki said the emergency relief plan "is big because the crises are big" but that it's really just an opening offer and the president believes they can get a bipartisan package.

"This is exactly how it should work," she said, "and it feels maybe unfamiliar to many people."

"The president of the United States laid out his agenda, laid out his bold vision. There's going to be a discussion with members of congress of both parties about where we go from here," she continued. "They'll like some pieces, they won't like some pieces, we'll see what the sausage looks like when it comes out of the machine."

"He's an optimist by nature, I can confirm for the American public," she said of Biden. "But also he's a believer, having spent 36 years in the Senate, that when the country is facing a crisis -- and we're facing multiple right now, not just health, the pandemic -- that Democrats and Republicans are going to have to come together to agree on a package to address this crisis."

When asked whether the Biden administration favours a delay on Trump's impeachment trial in the Senate in order to get more cabinet members confirmed, Psaki dodged the question and instead emphasized the urgent need for the confirmation process to move quickly.

"We want it to be expedited," she said. "Again, you know, the president is somebody who's focused on working with both parties to get both his cabinet through, address the crises we're facing, and that's what we're going to work to do everyday. We'll see if we're successful."

-ABC News' Sarah Kolinovsky and Morgan Winsor

Harris and her husband, second gentleman Doug Emhoff, will stay at Blair House while repairs at the vice president's official residence, the Naval Observatory, are underway, a spokesperson told ABC News.

Blair House, which was built in 1824, is located just steps from the White House and is the oldest of four connected townhouses that comprise the president's guest house.

An aide had previously confirmed that Harris will not immediately move into the Naval Observatory to "allow for repairs to the home that are more easily conducted with the home unoccupied." The repairs are to replace the liners in the chimneys "and other household maintenance," the aide said.

-ABC News' Ben Siegel and Morgan Winsor

On his third day in office, President Joe Biden will tackle one of the country's biggest issues: the economic recession brought on by the COVID-19 pandemic.

Biden will deliver remarks on his administration’s response to the economic crisis in the U.S. Friday afternoon, according to the White House.

His announcement will come as so many Americans (at least 900,000) continue to battle with unemployment caused by the pandemic.

Biden will also continue to sign executive orders, the White House said.

In his appearance on ABC's "This Week" Sunday, Biden’s nominee for Surgeon General Vivek Murthy said that when it comes to meeting the goal for 100 million vaccines in the first 100 days of the president's administration, there are things that could go right or wrong.

"I think President Biden fully understands there's a larger goal here, as we all do, which is that we've got to vaccinate as many Americans as possible. And that's going to take a lot of work, work dispelling this disinformation, working on the supply, increasing distribution channels," he told ABC News Chief Anchor George Stephanopoulos. "And that's some of what the vaccine plan that he announced over the last week is intended to -- to achieve."

Stephanopoulos pressed Murthy on whether there are ways to increase the supply and equitably distribute the vaccines.

"It appears, at least in these first vaccines that have gone out, they've been going largely to wealthier areas of the country, largely to whiter areas of the country," Stephanopoulos said.

"Well, it's the right question, George, because success has to be gauged not just by the number of vaccines we deliver but also by how fairly we deliver those vaccines -- how equitably we deliver them," he said in response. "What we've got to do here is not just, again, increase supply, which we can do using the Defense Production Act ... but we've also got to set up the kind of distribution channels, like mobile units, like strategically placed community vaccination centers, that can reach people who traditionally are hard to reach and don't have access to health care."

He added, "We have got to track our progress. We have got to make sure that we have data on where the vaccine is being administered, so that we can ensure that it, in fact, is being distributed equitably."