Biden acknowledges bad debate performance and age

• The president appeared to address some of those criticisms head-on Friday in an attempt to assuage Democrats' concerns. "I'm not a young man, to state the obvious," Biden said.
• "I don't walk as easy as I used to, I don't speak as smoothly as I used to, I don't debate as well as I used to, but I know what I do know. I know how to tell the truth," he said.
• "I would not be running again if I did not believe with all my heart and soul that I can do this job," he added.

Driving the news: Biden also hammered Trump for pushing falsehoods on the debate stage, while presenting the November election as a choice between right and wrong.

• "Folks, I give you my words. As a Biden I would not be running again if I didn't believe with all my heart and soul I can do this job. Because quite frankly, the stakes are too high."
• "The stakes are too high. Donald Trump is a genuine threat to this nation," Biden said.

Zoom in: First Lady Jill Biden spoke first during the campaign event, defending her husband's record and criticizing Trump's lies.

• "There is no one that I would rather have sitting in the Oval Office right now than my husband," Jill Biden said, an apparent response to questions from Democrats about whether Biden should step aside.

Go deeper: Biden's debate is a "DEFCON 1" moment for Democrats

Editor's note: This story was updated with additional remarks from the rally.