"Elizabeth, I think, as you know, has said that she is a capitalist through her bones. I'm not," he said in the interview airing Sunday. In 2018, Warren was quoted as saying "I am a capitalist to my bones" during an event held by a New England business organization.
Sanders is trying to regain physical strength after a heart attack more than a week ago, which could make his efforts to catch up with the leaders tougher. The self-described democratic socialist put up a surprisingly strong challenge to the party's eventual nominee Hillary Clinton in 2016 and has had a heavy influence on the Democratic issues debate this year.