2024 election updates: Manchin the latest to call on Biden to end reelection bid

Rep. Haley Stevens, a Michigan Democrat, said after President Biden’s Detroit rally that Biden "is the only candidate with a proven ability to beat Donald Trump."

Amid concerns from some who have witnessed the president behind closed doors about his ability to serve four more years, Stevens’ pledge of support comes after she spent the morning with the president on Air Force One, where, she said, "he demonstrated his leadership and wisdom, yet again."

"Now is the time to stay the course, work hard, ensure we beat Donald Trump, and protect our democracy for generations to come," she said.

Fellow Michigan Democrat Rep. Shri Thanedar, who traveled with Biden during the visit, told ABC News the president "delivered one of his strongest speeches."

"The more people try to pull him down - the stronger he's gonna get. It's energizing him - because he's a fighter," he said.

-ABC News’ Will McDuffie and Zohreen Shah

President Biden took the stage in this key battleground state intent on proving his critics wrong.

Before an amped-up crowd of 2,000 in Detroit, a fired-up President Biden railed against Donald Trump in pointed attacks, challenged the press, outlined his first 100 days in office and tried to make clear to his doubters, he isn’t going anywhere.

"Folks, I’m the nominee!" Biden roared as the crowd erupted.

"I’m the nominee as part because 14 million Democrats like you voted for me in the primaries. You made me the nominee. No one else, not the press, not the pundits, not the insiders, not donors. You the voters, you decided, no one else. And I'm not going anywhere," Biden said.

The president also framed his agenda by announcing his plan for his "first 100 days in office."

Biden pledged to codify Roe v. Wade, passing an assault weapons ban, passing the John Lewis Voting rights act and to make sure the rich pay their "fair share in taxes."

-ABC News' Mary Bruce, Molly Nagle and Will McDuffie

President Joe Biden came out strong against Donald Trump at his campaign event in Detroit, Michigan Friday.

Addressing his gaffes during the NATO conference Thursday, Biden said, "They’ve been hammering me because I sometimes confuse names. I say, that's Charlie, instead of Bill."

On Thursday, Biden referred to Ukrainian President Volodymyr Zelenskyy and Russian President Vladimir Putin.

During his press conference Thursday, Biden referred to Vice President Kamala Harris as Donald Trump.

Drawing attention to Trump’s history of name gaffes Biden said, "Donald Trump has gotten a free pass."

"I guess they don't remember that Trump called Nikki Haley Nancy Pelosi," Biden said.

"Donald, no more free passes," Biden continued, adding, "Today, we’re going to shine a spotlight on Donald Trump."

During a campaign event in Michigan Friday night, Biden reiterated his commitment to the race.

"As you've probably noticed, there's been a lot of speculation lately: What's Joe Biden going to do?" he told the crowd. "Is he going to stay in the race? Is he going to drop out?"

"I am running and we're going to win," he continued.

Biden said he's going to beat Trump again.

"I know him. Donald Trump is a loser," he said.