In Houston on Thursday, Democratic presidential hopefuls Mayor Pete Buttigieg, Sen. Bernie Sanders, former Vice President Joe Biden and Sen. Elizabeth Warren participate in the third Democratic primary debate of the 2020 presidential campaign season.

In Houston on Thursday, Democratic presidential hopefuls Mayor Pete Buttigieg, Sen. Bernie Sanders, former Vice President Joe Biden and Sen. Elizabeth Warren participate in the third Democratic primary debate of the 2020 presidential campaign season.