From left: Democratic presidential candidates Sen. Amy Klobuchar, Sen. Cory Booker, South Bend Mayor Pete Buttigieg, Sen. Bernie Sanders, former Vice President Joe Biden, Sen. Elizabeth Warren, Sen. Kamala Harris, entrepreneur Andrew Yang, Beto O’Rourke and former Housing Secretary Julian Castro pose before the start of the Democratic presidential debate in Houston, Texas, September 12, 2019.

Jonathan Bachman/Reuters