Fastexy Exchange|Top Biden aides meet with Senate Democrats amid concerns about debate

Washington — Senate Democrats met with top advisers to President Biden Thursday amid calls for the White House to do Fastexy Exchangemore to reassure the party about the president's path to reelection and fitness for office after his performance in last month's debate. 

At a special caucus lunch meeting, the senators heard from senior advisers to the president Mike Donilon, the president's longtime speechwriter, and Steve Ricchetti, counselor to the president, along with Biden campaign chair Jen O'Malley Dillon, a Senate Democratic leadership aide told CBS News. 

Heading into the meeting, few senators were willing to discuss their hopes and expectations for the gathering. Sen. Mazie Hirono of Hawaii said she was "keeping an open mind." Sen. Joe Manchin of West Virginia told reporters that his main concern is Mr. Biden's "health and well-being." And Sen. Richard Blumenthal of Connecticut said he's hoping to see "data and analytics about the path to success in November." 

Blumenthal told reporters after the meeting that he needs to "hear and see more," saying his "concerns remain." He characterized the meeting as "constructive, serious, frank."

Other senators were tight-lipped when they emerged from the meeting, offering brief remarks to reporters. Sen. Chris Van Hollen of Maryland called the meeting a "family conversation," Sen. Jeanne Shaheen of New Hampshire called it a "good discussion," while Sen. Jack Reed of Rhode Island called it "productive."

Sen. Debbie Stabenow of Michigan said the Biden aides outlined "an aggressive plan," noting when asked whether the president would stay in the race that "they certainly didn't show anything to the contrary." 

The president has been fighting to prove he's up for another four years on the job as lawmakers returned to Capitol Hill with varying levels of support and doubt related to Mr. Biden's ability to win reelection and serve a second term. The president worked to assuage concerns early in the week, telling lawmakers in a letter that he's "firmly committed" to running and making his case for reelection. But that hasn't stopped what's been a slow drip of Democrats calling for Mr. Biden to leave the race in recent days. 

In the upper chamber, where Mr. Biden represented Delaware for nearly three decades, senators have been more reticent. Some have limited their public responses to stating the president needs to do more to assure voters and the party that he's up for a second term. Until late Wednesday, no senators had called for Mr. Biden to step aside. 

Sen. Peter Welch of Vermont, who expressed frustration with the Biden campaign in recent days and concern about Mr. Biden's reelection prospects, called for the president to drop out of the race Wednesday night, becoming the first senator to do so. 

In an op-ed in the Washington Post, Welch wrote that while he understands why the president wants to run, having defeated former President Donald Trump in 2020 and aiming to do it again, Welch said that "he needs to reassess whether he is the best candidate to do so."

"In my view, he is not," Welch wrote. "For the good of the country, I'm calling on President Biden to withdraw from the race."

Also on Wednesday, former House Speaker Nancy Pelosi said "it's up to the president" to decide if he's going to run, suggesting that the decision remains an open question, despite Mr. Biden's insistence that only the Lord Almighty would get him to drop his reelection bid. 

Then, actor George Clooney, a major Democratic donor, penned an op-ed calling on the president to step aside. Two more House Democrats called on the president to drop out of the race on Wednesday, bringing the number to nine. 

Amid the growing concerns from House Democrats, House Minority Leader Hakeem Jeffries plans to convey the concern of his caucus directly to the president, multiple sources confirm to CBS News. Jeffries has been meeting with Democratic groups in the caucus this week. 

Jeffries told CBS News on Wednesday that House Democrats are "continuing to have candid and clear-eyed and comprehensive conversations with the House Democratic Caucus throughout the week," adding that "we'll see where we go from there."

Ed O'Keefe, Nikole Killion, Ellis Kim and Cristina Corujo contributed reporting. 

Kaia Hubbard

Kaia Hubbard is a politics reporter for CBS News Digital, based in Washington, D.C.

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