Biden notes 'world's looking to America' as he faces scrutiny before hosting NATO summit

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President Biden, reeling from a disastrous debate performance and calls to step aside, addressed a Black church service in Pennsylvania on Sunday, acknowledging the "world's looking to America."

Speaking from a stage at Mount Airy Church of God in Christ in northwest Philadelphia, the 81-year-old Biden laughed off concerns about his age, joking, "I know I look 40" but "I've been doing this a long time."

"I, honest to God, have never been more optimistic about America's future if we stick together," Biden said.

The president, later on in his remarks, also addressed the upcoming NATO summit in Washington, D.C.

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"I'm about to host the NATO nations in Washington. We put them together," Biden said. "The world's looking to us. Not a joke. The world is looking to America not to carry their burden, but to lead their hopes."

"When I ran for the first time for president, I said something basic. I said, we have to bring back dignity and hope in America, number one," the president added, wrapping up his remarks.

"Number two, we have to give working class and middle class people, like the family I came from, a shot and build the economy from the middle out and the bottom up, not the top down," Biden said. "And thirdly, we must unite America again. That's my goal. That's what we're going to do. God