US President Joe Biden reaffirmed on Monday his commitment to seeking reelection, stressing that he was the sole candidate the Democratic Party could rely on to defeat his Republican opponent, Donald Trump.

"Bottom line , I am not going anywhere," Biden told reporters. "I wouldn't be running if I didn't believe I was the best candidate to defeat Donald Trump."

This comes four days after his latest gaffe, in which he referred to himself as a black woman. 

Previous reports have suggested that Vice President Kamala Harris emerged as a favored replacement candidate among some members. 

But on Saturday, Biden reiterated his intention to remain in the presidential race, defying wishes by his own party to step aside amid inquiries into his mental fitness.

Disney, among other prominent donors, has already suspended donations to the party and will continue to cease funds unless Biden withdraws his candidacy for the presidential elections.

World bracing for potential Trump win

Politico reported on Sunday that the world is gearing up for Trump's potential electoral victory. NATO, for instance, has laid out a comprehensive plan to ensure sustained military support for Ukraine. The purpose of doing so is to avoid potential interference of a future Trump administration, as per the report.

Despite uncertainties, preparations are in full swing. With more than six months before the next US president takes office, NATO and its allies are implementing a multifaceted strategy.

This approach includes fostering personal connections with Trump and his advisors, adjusting policies to appease his political base, and instituting diplomatic safeguards to protect NATO's strategic interests.

Reflecting on these efforts, NATO leaders acknowledge the need for resilience in the face of potential disruptions. Their collective aim is to fortify their alliance against the backdrop of evolving US leadership dynamics.

Read more: 'I’m running the world', Biden says during ABC News interview

Concerns have been mounting within the alliance due to a potential return of Trump to office, as Politico spoke with 20 people connected to NATO or the alliance's upcoming summit over the past month and found that many allies already had quiet reservations about putting their trust in Biden well before the debate.

Now, Biden must convince his counterparts that he's not only up for the fight but also capable of overcoming a political crisis to remain in it.

"We all want Biden to have a second term to avoid dealing with Trump again, but this isn't reassuring," an official was quoted as saying by Politico.

The officials are also expressing concerns about Biden's age and health, according to the report. "We're not sure that, even if he wins, he can survive four more years," an official was quoted as saying by Politico.