The counter of that is that Harris has already surrounded her team with the same Obama/Biden corporcrats, and they will want to stay the course. She might not want to battle down with Congress and the Republicans too early because of the exploding Middle East; and the billionaires who back Democrats like their tax cuts too.
Still, nothing more explosive than a pissed off Black woman in power; especially a pissed off former Attorney General. If she unleashes Walz to tear Trumpster up, it's over.