Biden receives Obama's advice after a shaky debate performance, with a potential rematch with Trump on the horizon, according to a report.

Obama has joined forces with Biden to campaign for his re-election.

After Biden's subpar performance in the first presidential debate against Trump, even Obama may question Biden's chances of winning a second term in November.

According to The Washington Post, Obama phoned Biden after the debate to offer more words of support, and privately told his supporters that Biden's path to re-election has become more challenging since Thursday.

A Biden campaign spokesperson stated that Obama has provided "unwavering" support to his former vice president, while an Obama spokesperson declined to comment on private remarks made to the Post.

Biden campaign spokesperson Lauren Hitt stated that President Biden is thankful for President Obama's consistent support during the campaign, serving as a potent communicator to voters and a reliable advisor to the president.

Obama has not publicly called for Biden to withdraw, but has encouraged his former vice president to continue moving forward.

Obama stated on social media that bad debate nights can occur, but this election presents a choice between a candidate who has dedicated his life to fighting for the common people and another who is solely focused on himself.

"The choice between a truth-teller who knows right from wrong and will give it to the American people straight, and a liar who lies through his teeth for his own benefit, remains the same. Last night didn't change that, and it's why so much is at stake in November."

Obama reportedly acknowledged Trump's potential to win another term due to his political strengths.

In recent months, Obama, a prominent figure in the Democratic Party, has attended two significant fundraisers for Biden, including a lavish event in March at Radio City Music Hall with former President Bill Clinton in New York City.

In Los Angeles, last month, Obama and Biden attended a fundraiser hosted by George Clooney and Julia Roberts, which raised over $30 million.