Bernie Sanders bounces back Unlisted Video

Sen. Bernie Sanders' 2020 campaign has made major gains in the last few months.
Sanders has gained traction since he had a heart attack in early October.
Sanders is succeeding in the polls in early voting states as well as at the national level.
He won major endorsements along the way.
Business Insider says could be the most underestimated candidate in the race,.
He has come back even stronger after a health scare that would derail most campaigns.