Joe Biden's political career, his chances of winning reelection, and his presidency were all on the line when he stood before the cameras on Thursday night.
He hardly acknowledged it if those were the stakes. After a full hour of questions from reporters regarding his campaign, he dismissed them all and said he was fighting to complete the task he began when he took office in 2021, not for his legacy.
Depending on perspective, it was either a sign of dogged determination or of a man in denial about how dire his situation has become.
Minutes after the news conference finished, several more Democratic members of Congress publicly called on Mr Biden to step down, joining at least a dozen other lawmakers in the president's own party who have done so.
The question for Joe Biden's campaign is whether the floodgates will now open, or if the tide will hold.
The situation will not be helped by two excruciating gaffes that will be remembered by anyone who watched.
In his very first answer, he called his own Vice-President Kamala Harris "Vice-President Trump". That came just an hour after another headline-grabbing mistake at a Nato event, when Mr Biden introduced Ukrainian President Volodymyr Zelensky as "President Putin", prompting loud gasps in the audience.
He corrected the first verbal misstep involving Ukraine's leader quickly. The second one he didn’t catch, even as some reporters in the room murmured in surprise.
Those moments - the only major stumbles in an otherwise steady if not vigorous, appearance - will surely prompt nervous Democrats to wonder if there are more gaffes to come if the president presses ahead with his campaign.
But for now at least, Mr Biden seemed the happy warrior, insisting he will push on. He laughed and smiled as he was peppered with questions, and said he could keep up with Russia's Putin and China's Xi, even if the hoarseness and cough that had been on display during his debate two weeks ago still appeared to linger.
He again insisted he didn't need cognitive tests, telling reporters that if he even saw "two doctors or seven", his critics wouldn't be satisfied.
The election campaign, he said, had barely started, and he again repeated that he was confident he could beat Trump in November's election.
The Democratic delegates who will back him officially as the party's nominee at next month's convention were free to change their minds as they pleased, he said, before whispering: "It's not going to happen."
But the storm clouds that linger around Biden’s campaign won’t be so easily dispelled.
More Democratic politicians are waiting in the wings, according to reports, poised to announce their own break with the president, having waited until the conclusion of this Nato summit to voice their concerns.
And that’s just the first round of tests for the embattled president. He has another high-profile sit-down interview, with NBC’s Lester Holt, on Monday. Donors are anxious, and earlier on Thursday several reports suggested that even figures in the president's own campaign were thinking about calling time on their candidate.
Despite all of this, Mr Biden made clear that it will be a challenging task to pry the nomination away from him. The 81-year-old man who at times gripped the lectern with two hands insisted he was the "best-qualified person" and is not going to exit the stage quietly.