If I cared to offer than advice I’d tell them to nominate Kamala Harris and I think they might.
She’s a Clinton democrat not beloved of the lunatic left but she’s recently signed on to berniecare and her skin color/gender shield her from too much criticism in the rat party. As a light-skinned, relatively attractive former prosecutor she’s palatable to White suburbanites.
The corporate dems could force Harris through. The socialists hate her because she didn’t prosecute Mnuchin, and generally because she is one of the corporate dem elite herself.