2020 Democratic Primaries:
Winner: Tulsi Gabbard, US Representative from Hawaii
Runner ups: Kamala Harris, US Senator of California
Pete Buttigieg, Mayor of South Blend, Indiana
Julian Castro, former Mayor of San Antonio, Texas and Secretary of Urban Housing and Development
Cory Booker, US Senator of New Jersey (withdrew and endorsed Harris, later Gabbard)
Elizabeth Warren, US Senator of Massachusetts (withdrew and endorsed Gabbard)
Withdrew before the primaries:
Bernie Sanders, US Senator of Vermont
Joe Biden, Former Vice President of the United States and US Senator of Deleware
Andrew Yang, Entrepreneur from New York
Amy Klobuchar, US Senator of Minnesota
RIchard Ojeda, US Senator of West VIrginia (withdrew before primaries)
John Delaney, US Representative of Maryland
Jay Inslee, Governor of Washington
Beto O'Rourke, former US Representative of Texas
John Hickenlooper, former Governor of Colorado
Kirsten Gillibrand, US Senator of New York
Marianne Williamson, Author from California
Eric Swalwell, US Representative of California
Tim Ryan, US Representative of Ohio
Tom Steyer, American Billionare
Michael Bennett, US Senator of Colorado
Mike Gravel, former US Senator of Alaska
Steve Bullock, Governor of Montana
Bill de Blasio, Mayor of New York City
Wayne Messam, Mayor of Miramar, Florida
Seth Moultan, US Representative of Massachusetts
Joe Sestak, US Representative of Pennsylvania
People who expressed interest but declined to run:
Hillary Clinton, Former First Lady, US Senator of New York, and Secretary of State
Michelle Obama, Former First Lady
Oprah Winfrey, Talk Show Host
Kanye West, Rapper, singer and producer
Andrew Cuomo, Governor of New York
Sherrod Brown, US Senator of Ohio
Jeff Merkley, US Senator of Oregon