President Joe Biden, fighting to save his endangered reelection effort Friday, said his disastrous debate performance last week was a “bad episode” and there were “no indications of any serious condition” in a highly anticipated ABC interview that was seen as a significant test on his fitness to run for office.

“I didn’t listen to my instincts in terms of preparing," Biden told ABC's George Stephanopoulos in an excerpt that aired Friday evening.

Yet Biden's rigorous efforts to course correct from his debate performance were not yet quelling internal party frustrations, with one influential Democratic senator working on a nascent push that would encourage the president to exit the race and Democrats quietly chatting about where they would go next if the president drops out — or what it would mean if he stays in.

Still, in Wisconsin, Biden was focused on proving his capacity to remain as president. When asked whether he would halt his campaign, he said told reporters he was “completely ruling that out” and said he is “positive” he could serve for another four years. At a rallyin front of hundreds of supporters he acknowledged his subpar debate performance but insisted: “I am running, and I'm going to win again.”

“I beat Donald Trump,” a forceful Biden said, as the crowd gathered in a local middle school cheered and waved campaign signs. “I will beat him again.”

Biden, relying on a teleprompter for his remarks, attacked his presumptive Republican challenger almost immediately, laying into Trump by pointing out that the former president once said that “George Washington’s army won the revolution by taking control of the airports from the British.”

As the crowd laughed, Biden continued, “Talk about me misspeaking.”

In his speech, Biden tried to flip the questions swirling about his age, asking the crowd rhetorically whether he was “too old” to have passed gun legislation, created jobs and helped ease student loan debt — while suggesting he'd do more in a second presidential term.

The rally preceded an interview that could be a watershed moment for Biden, who is under pressure to bow out of the campaign after his disastrous debate performance against Republican Donald Trump ignited concern that the 81-year-old Democrat is not up for the job for another four years.

The interview with ABC's George Stephanopoulos was seen as a potential watershed moment. There was broad agreement that Biden could notot afford to have another "bad day," which is how he wrote off his debate flop. It was not clear that even a so-so performance would be enough to satisfy concerns about his fitness to serve.

While private angst among Democratic lawmakers, donors and strategists is running deep after Biden’s damaging debate performance, most in the party have held public fire as they wait to see if the president can restore some confidence with his weekend travel schedule and his handling of the Stephanopoulos interview, airing in full Friday night.

To that end, Sen. Mark Warner reached out to fellow senators throughout this week to discuss whether to ask Biden to exit the race, according to three people familiar with the effort who requested anonymity to talk about private conversations. The Virginia Democrat’s moves are notable given his role as chair of the Senate Intelligence Committee and his reputation as a lawmaker who has supported Biden and developed working relationships with colleagues in both parties. Warner’s effort was first reported by The Washington Post.

The strategy remains fluid. One of the people with knowledge of Warner's effort said there are enough Senate Democrats concerned enough about Biden's capacity to run for reelection to take some sort of action, although there was yet no consensus on what that plan would be.

Meanwhile, at least three House Democrats have called for Biden to step down as the nominee, with Rep. Seth Moulton, D-Mass., joining Texas Rep. Lloyd Doggett and Arizona Rep. Raúl Grijalva in pushing for an alternative. While not going that far, Massachusetts Gov. Maura Healey said in a carefully worded statement Friday that Biden now has a decision to make on “the best way forward.”

“Over the coming days, I urge him to listen to the American people and carefully evaluate whether he remains our best hope to defeat Donald Trump,” Healey said.

There were also a few signs of discontent at Biden's campaign rally Friday, with one supporter onstage waving a sign that read “Pass the torch Joe” as the president came out. His motorcade was also greeted at the middle school by a few people urging him to move on.

But others were pleased. Rebecca Green, a 52-year-old environmental scientist from Madison, said she found Biden’s energy reassuring. “We were just waiting for him to come out strong and fighting again, the way we know he is,” she said. “I don’t know what was going on in the debate. It could never overshadow what he’s done."

Many Democratic lawmakers, who are hearing from constituents at home during the holiday week, are split on whether Biden should stay or go. Lawmakers have been deeply frustrated by his campaign’s response to the crisis. Privately, discussions among the House Democrats flared this week as word spread that some of them were drafting public letters suggesting the president should quit the race.

Yet pushback from other House Democrats was fierce, and none of the letters from either Democrats in competitive reelection bids or those in easier races that were reportedly being discussed were ever made public.

“Any ‘leader’ signing a letter calling for President Biden to drop out needs to get their priorities straight and stop undermining this incredible actual leader who has delivered real results for our country,” said Rep. Frederica Wilson, D-Fla., an influential member of the Congressional Black Caucus.

Biden appears to have pulled his family and inner circle closer while attempting to prove that he's still the Democrats' best option for competing in November's election.

The ubiquitous presence of Hunter Biden in the West Wing since the debate has become an uncomfortable dynamic for many staffers, according to two Democrats close to the White House who requested anonymity to discuss the sensitive matter.

For many staffers, the sight of Hunter Biden, just weeks after his conviction on felony gun charges, taking a larger role in advising his father has been unsettling and a questionable choice for the high-stakes moment, they said.

Biden's reelection campaign is pushing ahead with aggressive plans despite the uncertainty. It plans to pair his in-person events with a fresh $50 million ad campaign this month meant to capitalize on high viewership moments like the Summer Olympics that begin in Paris on July 26.

Biden, Vice President Kamala Harris, first lady Jill Biden and second gentleman Doug Emhoff are scheduled to travel to every battleground state this month, with Biden in Pennsylvania on Sunday. In a strategy memo released Friday morning, the campaign also specifically emphasized that Biden would participate in “frequent off-the-cuff moments” –- once a hallmark of the gregarious, glad-handling politician’s career that have nonetheless dwindled throughout his presidency.

For Biden, every moment now is critical to restoring the lost confidence stemming from his shaky performance in Atlanta last week. Yet the president continued to make slipups that did not help that effort.

In a hastily organized gathering with more than 20 Democratic governors Wednesday evening, Biden acknowledged that he needs to get more sleep and limit evening events so he can be rested for the job, according to three people granted anonymity to speak about the private meeting.

In trying to explain away those comments, Jean-Pierre stressed that Biden “works around the clock” but that he “also recognizes the importance of striking a balance and taking care of himself.”

Kentucky Gov. Andy Beshear, who attended the meeting, said Biden “certainly engaged with us on complicated matters.”

“But then again, this is something that he needs to not just reassure Democratic governors on, but he needs to reassure the American people,”

California Gov. Gavin Newsom said no one in the room was “sugar-coating” the reality of last week's debate.

“You watched the physiology. You saw everything about it. It was the breathing, it was the physical, the whole thing,” Newsom said at a subsequent event in Holland.

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Kim reported from Washington. Associated Press writers Joey Cappelletti in Saugatuck, Michigan, Todd Richmond in Madison, Dylan Lovan in Louisville, Kentucky, and Mary Clare Jalonick, Aamer Madhani, Lisa Mascaro and Josh Boak in Washington contributed to this report.