Did anyone see the Donnie Deutsch-Lawrence O'Donnell dust up?

Donnie was complaining about how none of the candidates on stage had any hope of beating Trump. O'Donnell took exception with that saying that it was just all meaningless speculation with no value at this point. Donnie got very upset over this telling O'Donnell not to say that about his opinions.

It's not even July 2019 and i'm already sick of hearing Donnie Deutsch's opinions. He markets himself as some kind of Trump whisperer and only he has insight into beating him. It's just odd, and dumb.