Biden?
Even more of an airhead than Biden, so far at least. Biden can give a speech and hit the points they want him to hit, however poorly he does it. Harris is just speaking nonsense and hasn’t shown that she can even do as well as Biden.
Listen to what Biden said at Morehouse, or just look at what he’s been doing these last three years. How much further left could Harris go? She’d do what they want her to do, but they don’t think she’d do it at all well.