I believe they can transfer the money to whomever they want.
But they have to agree to do so.
I don’t see Biden doing that. Harris might night either.
Campaign contribution limits apply. At least that is what it looked when I looked it up. They can keep it for a future campaign, return it, pay campaign debts and remaining expenses and debts. But just giving it to another candidate. They can’t just transfer it.
“I believe they can transfer the money to whomever they want.”
absolutely wrong: the FEC absolutely prohibits candidates from “transferring” campaign contributions amongst each other willy nilly ... the ONLY person other than Biden who can benefit from the Biden/Harris campaign donations is Harris ... period ...