The participants are:
Joe Biden, former vice president
Cory Booker, senator from New Jersey
Pete Buttigieg, mayor of South Bend, Ind.
Tulsi Gabbard, representative from Hawaii
Kamala Harris, senator from California
Amy Klobuchar, senator from Minnesota
Bernie Sanders, senator from Vermont
Tom Steyer, billionaire business executive and activist
Elizabeth Warren, senator from Massachusetts
Andrew Yang, founder of Venture for America