Transcript for Bernie Sanders Reacts to Hillary Clinton's Refusal to Debate

And is here. You mentioned California at well Hillary Clinton she dis declining to debate you before the all important. Primary in California why do you think that she won't. Well I think probably think I have my ideas were probably out there start look we have one. The last three. Primaries and we fight include talking. I think there are a lot of people all who also applauding also that we got a good chance to win here. In California and all I can say is I think she just also want to go face to face. But debating her views on important issues vs Mike use. She's already done that a few times already maybe she feels it's enough this is joint let me ask another question. Nevada's Democratic Party filed a formal complaint accusing your supporters of inciting. Actual violence and now we hear permits to demonstrate hatchet to demonstrate a being issued in Philadelphia. That you said the convention is going to get messy this all sounds very scary to may very ominous and I'm not comfortable with that. What do you say that Ernie. Well but isolated Troy is there was little violence. In Nevada a place was surrounded with police offices. There was no indication of violence or not one person was clutch. Dot you know you read in the media the chance what thrown. U of WC one video of a Chad being thrown they're just not sure what did take place and which I condemn. People will bullying they will allow there was some obscenities that's true but in fact there was no violence act like we viewed just that in terms of drug. I was just gonna say that what it's looking I'm sacked Tom you know fun and some of them. Paulson the Democrat applauded got wet and nasty calls from folks. Speaking supposedly on you about half now it took a couple of days for you to say I don't you have to stop doing this because you know if winner and where. Angry and Donald times people for doing this I kind of feel that. I needed to see a little warmth farmer from you saying this we don't threaten people's children this is not how this will tell us. We don't welcome bubbly yes look we don't have to talk about the effort to the second study is an outrage of course you don't threaten people's told you don't threaten. In individual that's an outrage it's unacceptable Larry that it from day one by only point is with the media was saying. Chad scooping go door pop solo without whom. And nobody was arrested Tokyo all looks like of course like had done that button joy raised the issue of Philadelphia. Joy yet people in America how the right. To demonstrate you know it's part of what the constitution. Of the United States is sold so let's not confuse. Different things it goes without saying. What to have a vigorous debate about whether we should join the rest of the industrialized world and guarantee paid. Family and medical leave that we deal with usual in common wealth inequality that we effectively and aggressively deal with climate change that we deal would pay equity for women. He's over issues that have to be debated Secretary Clinton and I have different points of view on many of these issues I don't see anything Walt with a vigorous debate. Right out yet so now holed up. The other debate we have to have is with DOS boxes so we're gonna take a quick break. And will be right back to Charlie talk won't.

This transcript has been automatically generated and may not be 100% accurate.