Joe Biden would never finish out his term, not just because he's an idiot but because the Deep State would mandate (and insure) his removal. What the Deep State is looking for is an open-nomination un-electable individual who they would put in place as the VP running mate to serve a few days under 10 years as president upon Joe's "resignation" shortly after his 2-year mark passes.
Joe Biden will have absolutely no say into his vice presidential running mate. That person will most likely be in her fifties, maybe forties or even late thirties, most probably of color, and definitely a Deep State socialist. (Note I didn't say "him or her.") This person will HAVE to energize the Bernie base (crucial), and be able to work hand-in-hand with the RINO-progressive Deep State aparatus to destroy the United States so at the end of her pragmatic 10-year rule, the Constitution will be completely obliterated.
There is ***no way*** that Joe Biden would be the actual head of the Democrat Party. The titular head will be, and MUST be, the VP.