Trump announces new impeachment legal team

White House Press Secretary Jen Psaki shared Biden’s reaction to headlines this morning that Johnson & Johnson said its vaccine is 85% effective against severe COVID-19 disease.

“The president is encouraged by positive data on a potential new vaccine,” Psaki said. "He also knows that this is just new data and now is the time for the FDA to do its job of evaluating the safety and efficacy of the vaccine."

In the wide-ranging briefing, Psaki also took multiple questions about the controversy surrounding GameStop stock that upended Wall Street and drew swift reactions from lawmakers this week. 

“I know the SEC issued a new statement earlier this morning,” she said. “I’d certainly point you to that and others to that.” 

“We of course respect the role of regulatory agencies, they are closely monitoring the situation, but it’s under their purview at this point in time,” she added. 

Psaki distanced the White House from the saga, adding, that “part of our education can be conveying to people that the SEC is the regulatory body that would oversee this and can speak to it further.”

President Joe Biden ends a busy week with a visit to wounded service members at Walter Reed National Military Medical Center on Friday. 

The afternoon visit will also mark the first time the new president will ride Marine One, and it's unclear whether he will stop to take questions from reporters the way his predecessor did before boarding the chopper on the White House South Lawn. 

Earlier Friday, Biden and Kamala Harris will receive the President’s Daily Brief at the Oval Office as well as an economic briefing with the new Treasury Secretary Janet Yellen. 

Biden is not expected to sign any new executive orders Friday, though he has been churning them out since he entered office. 

Meanwhile, White House press secretary Jen Psaki will hold a briefing this morning at 10 a.m. ET.

Florida Rep. Matt Gaetz on Thursday traveled to House Republican Conference Chair Liz Cheney's home turf to urge Wyomingites to vote her out of office in 2022, arguing that the at-large congresswoman is part of the "establishment power brokers" in Washington and out of touch with the people she represents.

In an interview with ABC News Live Prime following the rally, anchor Linsey Davis pressed Gaetz on how his rally will help his party win back the House, Senate and White House in the next two cycles.

"I want Republicans to win, but to do that, we have to be worthy of winning," Gaetz argued. "Right now, there's an identity crisis in the Republican Party. There are some in Washington who believe that we've got to purge Trumpism ... I think a different view. I think that we've got to get out in the country, and we have to marshal a positive populism that will lead to better candidates, better policies and ultimately a better electoral performance."

-ABC News' Quinn Scanlan

Acting U.S. Capitol Police Chief Yogananda Pittman called for permanent fencing and availability of "ready, back-up forces in close proximity of the Capitol" in a statement Thursday. Following the violence on January 6, which led to the death of U.S. Capitol Police Officer Brian Sicknick, Pittman had her staff "conduct a physical security assessment" of the Capitol.

"In light of recent events, I can unequivocally say that vast improvements to the physical security infrastructure must be made to include permanent fencing, and the availability of ready, back-up forces in close proximity to the Capitol," Pittman said in a statement. "I look forward to working with Congress on identifying the security improvements necessary to ensure the safety and security of the Congress and the U.S. Capitol."

The Capitol Police Board will have to approve the additional security measures and Congress will have to appropriate funding for it before any permanent fencing is put up. Some members of Congress have already criticized the proposal, citing access to the Capitol building.

"This is the People's House. I am adamantly opposed. There has been no threat briefing given to Members of Congress to justify this proposal," Rep. Elise Stefanik, R-N.Y., said on Twitter.

Senate Majority Leader Chuck Schumer told ABC News that he "would tend to defer to the experts," about the security needs for the building. Though he added that there, "should be both safety and the right to access the building."

-ABC News' Benjamin Siegel, Allison Pecorin and Jack Date