http://www.slate.com/articles/news_and_politics/politics/2015/10/bernie_sanders_first_democratic_primary_debate_what_to_expect_from_the_vermont.html

Tens of thousands of people have seen Sen. Bernie Sanders speak in person. Hundreds of thousands have seen him from screens of some sort. But Tuesday night, at the Democratic presidential debate in Las Vegas, will be the first time America—or at least a substantial fraction of Americans—will witness the Vermont senator and “democratic socalist” in action. And for Sanders, it’s a test of what he wants to do with his candidacy.