From left, Democratic presidential candidates Sen. Amy Klobuchar (D-Minn.), Sen. Cory Booker (D-N.J.), South Bend, Ind. Mayor Pete Buttigieg, Sen. Bernie Sanders (I-Vt.), former Vice President Joe Biden, Sen. Elizabeth Warren (D-Mass.), Sen. Kamala Harris (D-Calif.), former tech executive Andrew Yang, former Texas congressman Beto O’Rourke, and former housing secretary Julian Castro appear on stage before the start of the Democratic Presidential Debate at Texas Southern University’s Health and PE Center on Thursday, Sept. 12, 2019 in Houston, Texas. Ten Democratic presidential hopefuls were chosen from the larger field of candidates to participate in the debate hosted by ABC News in partnership with Univision. (Justin Sullivan/Getty Images/TNS)