Biden supporters - how did Bernie & Pete attack Biden?

[LeftTurn3623]

First I'm not trying to be combative.

2nd I think Biden has been doing a much better job of late - in the last debate (I thought he won) and on the trail and in interviews. To me he has seemed very Presidential. I actually hope its not too late for him because I want him in the other lane and not Bloomberg.Obviously Pete first but I'm a realist.

With all that said, he has been hammering Sanders and when asked why he is going after other contenders ... his answer is they have been attacking him and he is just now defending himself.

This was the answer to the Pete attack ad which I thought was really beneath Biden to pull such a thing & to him consistently going after Sanders.

Maybe I missed something and I'm really asking serenely. How and when did Bernie attack Biden ? and other than Pete saying in general terms about moving on from old ideas and having a new look at things in Washington, how has he attacked Biden. He hasn't called him out by name. Its no different that politicians running on their experience. Someone like Pete has to run on being an outsider. But I cant think of him calling out Biden directly.

Too me Biden saying he is defending himself is an excuse because he is falling behind these 2 and needed to start attacking them. But I cannot point to a time either went after Biden directly.