The recent debate against rival Donald Trump appears to have confirmed some people's worst fears. Critics said the oldest sitting president in American history is in a state of cognitive decline.

That's because two weeks ago, Biden appeared in a nationally televised debate physically frail, confused and dazed.

Now, several members of Biden's party are calling for the president to withdraw from the presidential election. More than 10 Democrats in the House of Representatives have urged Biden to step aside, and Vermont Sen. Peter Welch became the first Democratic senator to make this request. "People within Biden's own party "Biden is calling for him to step aside and allow the Democratic convention to choose another candidate for a three-month race against Trump," Darrell West, a senior fellow at the Brookings Institution, told Xinhua news agency.

On Wednesday, former House Speaker Nancy Pelosi, a longtime Biden ally, did not respond directly when she was asked if she supports Biden continuing in the campaign. Instead, she stated that "it's up to the president to decide if he's going to run" and noted that "time is running out."

The media chorus has been strong in the two weeks since the debate, with a daily avalanche of op-eds calling for Biden to withdraw. New York Times Chief White House Correspondent Peter Baker wrote that the Biden's "hesitant and disjointed performance" sparked a "wave of panic among Democrats." National Public Radio reported that private fears within the Democratic Party about Biden are "slowly becoming public."

Biden hosted a major NATO summit in Washington this week. With concerns lingering within the Democratic Party, all eyes were on the president as he made a concerted effort to ease fears about his age and his mental fitness.

In a speech before the press conference, he mistakenly called Ukrainian President Volodymyr Zelensky "President Putin." During the press conference, Biden accidentally referred to Vice President Kamala Harris as "Vice President Trump."Biden's press conference started later than planned. For about an hour, he fielded questions from about 10 media outlets, many of which focused on whether he should continue running for office. Biden firmly reiterated his intention to remain in the race.

Analysts said Biden answered reporters' questions about foreign policy and NATO policy and stumbled a bit with other answers.

Answering questions about his cognitive condition, Biden told reporters: "The only thing age does is create a little wisdom." "No one will be satisfied no matter how much evidence Biden accepts, how many interviews he does, etc.," he said. Ashley Parker, White House reporter for The Washington Post. "And again, that's the challenge, because he needs to do something that will end this discussion about his fitness and allow Democrats to get back to talking about Trump."

Last week, Biden appeared in an interview on ABC to assure voters that he is the right person for the job.

Christopher Galdieri, a political science professor at Saint Anselm College in New Hampshire, told Xinhua: "To some extent, I think things like her ABC interview and other appearances have helped. The big problem is that none of them have helped. been the kind of platform the debate was. And these efforts haven't stopped calls from elected Democrats and fundraisers for the president to drop out of the race. Notably, as doubts about Biden grow within of the party, those publicly calling for his withdrawal remain a minority, possibly due to the lack of consensus on a successor candidate.

Pressuring Biden to resign abruptly could prevent any Democratic leader from uniting the party. It could lead to internal chaos, dealing a devastating blow to Democrats in the presidential election in early November.

As Biden stated in a letter to Democratic lawmakers on Monday, there are only 42 days left until the Democratic National Convention officially announces the party's presidential nominee and just 119 days until the general election. "Any weakening of the resolution or lack of clarity on "The task before us only helps Trump and hurts us," Biden concluded. "It's time to come together, move forward as a unified party and defeat Donald Trump."

According to the latest polling average from Real Clear Politics, Trump has received a boost in key states, including Michigan, Wisconsin and Pennsylvania, since the debate.

Those three states are crucial to winning the election, experts said. Trump leads Biden in several other key swing states, some by significant margins.

On Thursday night, Trump ridiculed Biden in an online post after the NATO news conference, during which Biden mistakenly referred to his vice president as Trump.

"Crooked Joe begins his 'Big Boy' press conference by saying, 'I wouldn't have picked Vice President Trump to be vice president,'" Trump said in a post on his Truth Social site. "Good job, Joe!"

Now that Trump leads Biden in the electoral polls, NATO countries are worried.

"Most allies see Trump as anti-NATO and isolationist... They fear this will weaken the alliance and jeopardize U.S. support for Ukraine," said William Courtney, retired U.S. ambassador to Ukraine. adjunct member of the RAND Corporation. Xinhua.A report by The Hill noted that NATO's next secretary general, Mark Rutte, may face his biggest challenge with Trump's potential return to the White House.

The report notes that the increasing likelihood of Trump being re-elected will only exacerbate Europe's concerns about the US withdrawal from NATO under Trump's leadership.