This isn’t framed as criticism of Sanders, but if you believe that Biden’s only real appeal is electability and all four s strike at the heart of that, what conclusion does that imply about the effectiveness of a candidate who declined to raise them? https://twitter.com/ChrisMegerian/status/1249491719101591553

The internal battle over whether and how to attack Biden tore at the Sanders campaign for months, as @jmartNYT and I detailed in this story https://www.nytimes.com/2020/03/21/us/politics/bernie-sanders-democrats-2020.html

But Sanders himself was never really persuadable, & his top aides lost patience with efforts to force his hand.

(An alternate view, of course, is that most Democratic voters actually do like Biden — much as Sanders does himself — and that attacking him with claims that he is personally corrupt, dishonest and predatory would have been likelier to stir backlash than to change minds ...)