2024 election updates: 'I've gotta finish this job,' Biden says

The president insisted that he has no plans to drop out to make room for Vice President Kamala Harris or anyone else.

Asked if he would considering bowing out before November if shown data that Harris could perform better against Trump, Biden responded, "No, unless they came back and said, 'There's no way you can win.'"

"No one's saying that," Biden said. "No poll says that."

He conceded that there are probably other candidates "who can beat Trump" but pointed to his campaign's strong fundraising and operations in battleground states, noting that anyone other than him would have "to start from scratch."

"I think I am the best qualified to win," Biden said as his news conference neared an end. "But there are other people who could beat Trump, too."

"But it would be hard to start from scratch," he quickly added. "We talk about money raised. We are not doing bad. We've got about $220 million in the bank. We are doing well."

Asked if he is going to take a cognitive test before the election amid questions about his mental fitness in the wake of the debate, Biden said that if his doctor told him he needed to, he would.

Biden said he has taken three "significant" neurological exams during his presidency, most recently in February.

"They say I am in good shape," he said, reiterating that he is tested "every single day" on his neurological capacity in his job.

The president added, "No matter what I did, not everyone is going to be satisfied."

The president is reiterating his determination to run for reelection, despite the growing number of Democratic lawmakers and others who are calling for him to step aside.

"I think it's important that I allay fears," he said, referring to campaign appearances on Friday in Detroit and next week in Texas and Nevada.

"I gotta finish this job," he said. "I gotta finish this job, because there's so much at stake."