Bernie wants to be POTUS. He’s playing for all the marbles...and the biggest demonstrable LIAR in the race says to him “Are you calling me a liar”!? And he doesn’t go in for the kill shot! It won’t be Bernie...no heart.
You make a valid point but there’s also the fact that he didn’t want to get into a very public tussle with somebody right in front of cameras.
I have no idea who I want to be the Democrat nominee but either one of these clowns would be easy to beat.