my gut feeling is that most of the short list is composed of political duds (bass included) and that's not what democrat strategists are looking for. not only do they get enough of that from biden, but they are grooming the 2024 presidential candidate. even if biden wins, there's no way he's completing two terms.
LOL... Biden is almost 78 years of age. By the time his first term ends, he will be 82. And from what I have heard, he is having all sorts of health issues haunting him even now. Trump is not that young, but he is in a much more healthier state. So it is almost certain that the Democrat VP pick will be the nominee for the 2024 POTUS elections.