"Look, we are feeling good, but we take nothing for granted," said Sanders.
Sanders said he's proud of how diverse his supporters are in 2020 compared to 2016, and is seeing extraordinary enthusiasm in the Latino and African American communities.
"Let's not only defeat Donald Trump, which we have got to do, let us transform this country and create a government and an economy that works for all of us, not just the Bloomberg's of the world and 1 percent," said Sanders.
Speaking of Bloomberg, the former New York City Mayor trails Sanders by only four points in an exclusive Eyewitness News poll conducted by survey USA, released Tuesday before the Las Vegas debate. Bloomberg argues he's the best candidate to beat Trump.
"He's the worst candidate. Because there will be no energy and excitement coming from a Bloomberg candidacy," said Sanders, who was asked whether it concerns him that Bloomberg will continue to flood the airwaves in California.
"Yes it does, it really does. At the end of the day, we have got to decide as Americans whether we believe in democracy which means anybody can run for office, or whether we believe in oligarchy where billionaires can buy elections," said Sanders.
A key platform of Bernie Sanders campaign is to not take any money from Super PAC's. Elizabeth Warren had that same rule, but changed positions this week.
"It's a bit disappointing. A few weeks ago Elizabeth was on the stage of the debate talking about how she hated Super PAC's, how they were damaging democracy. Well, I guess her views have changed," said Sanders.