Biden Campaign Will Try to Reassure Big Donors

President Biden’s top campaign official is scheduled to hold a crucial conference call with donors on Monday to try to convince them that Mr. Biden can still win the race against former President Donald J. Trump.

The call with the national finance committee, scheduled hastily on Sunday, is the Biden campaign’s most formal attempt yet to tamp down panic within the ranks of major donors since Thursday’s debate.

Some individual donors have received direct communication from campaign officials, and Biden fund-raisers say communication picked up over the weekend, according to people close to the conversations. The call on Monday is to be hosted by Jennifer O’Malley Dillon, the campaign chair.

Preserving the donor base will be critical to the president’s argument for staying in the race, many of Mr. Biden’s allies have acknowledged.

Mr. Biden huddled out of sight at Camp David on Monday morning as his team remained defiant, promising that he will stay in the race despite last week’s debacle. He plans to return to the White House on Monday evening.

Family members and friends spent the weekend urging Mr. Biden to keep fighting, even as some Democrats and others called on him to step aside. At the White House and the campaign, aides tried to press forward as usual, putting out news releases on student loans and the president’s overtime policies.