After watching the Clinton impeachment, I thought I would never see another one. But I think we’re in impeachment territory for the first time.

I think that the obstruction of justice was the number one charge against Nixon that brought him down.

I'm a lapsed lawyer, I can not tell you if it meets all of the legal definitions, but I can tell you from a lay point of view, it looks like [Mr Trump] was trying to impede the investigation, he was using his power to do that, and when James Comey didn't go along with him, he wasn't his boy, he fired him, which I think is also relevant to the question of what he was trying to do.

So, from my point of view, this is of enormous consequence for his presidency.