Democratic presidential hopefuls Former Vice President Joe Biden (L), Massachusetts Senator Elizabeth Warren (C) and California Senator Kamala Harris (R) speak during the third Democratic primary debate of the 2020 presidential campaign season hosted by ABC News in partnership with Univision at Texas Southern University in Houston, Texas on September 12, 2019. (Photo by Robyn BECK / AFP) (Photo credit should read ROBYN BECK/AFP/Getty Images)
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Candidates face off in third Democratic debate in Houston

Election 2020 Debate

Democratic presidential hopefuls former Vice President Joe Biden, Massachusetts Sen. Elizabeth Warren and California Sen. Kamala Harris speak during the third Democratic primary debate in Houston.  (Robyn Beck / AFP/Getty Images)

Election 2020 Debate

Security staffers corral protesters during the debate at Texas Southern University.  (Win McNamee / Getty Images)

Election 2020 Debate

Minnesota Sen. Amy Klobuchar and New Jersey Sen. Cory Booker.  (Robyn Beck / AFP/Getty Images)

Election 2020 Debate

Cory Booker smiles for photos before the audience during a break.  (Win McNamee / Getty Images)

Sen. Kamala Harris recalls the late Sen. John McCain's thumbs-down vote that defeated President Trump's effort to repeal Obamacare.

Sen. Kamala Harris recalls the late Sen. John McCain’s thumbs-down vote that defeated President Trump’s effort to repeal Obamacare.   (David J. Phillip / Associated Press)

Sen. Cory Booker responds to a question.

Sen. Cory Booker responds to a question.  (David J. Phillip / Associated Press)

Election 2020 Debate

Former Vice President Joe Biden and Sen. Elizabeth Warren during a break.   (David J. Phillip / Associated Press)

Former Texas Rep. Beto O'Rourke, right, listens to Andrew Yang.

Former Texas Rep. Beto O'Rourke, right, listens to Andrew Yang.  (David J. Phillip / Associated Press)

Election 2020 Debate

Beto O'Rourke makes a point.   (Win McNamee / Getty Images)

Joe Biden listens as Elizabeth Warren speaks.

Joe Biden listens as Elizabeth Warren speaks.   (David J. Phillip / Associated Press)

Bernie Sanders and Joe Biden.

Bernie Sanders and Joe Biden.   (David J. Phillip / Associated Press)

Joe Biden is flanked by Bernie Sanders and Elizabeth Warren.

Joe Biden is flanked by Bernie Sanders and Elizabeth Warren.   (David J. Phillip / Associated Press)

From left, Joe Biden, Elizabeth Warren, Kamala Harris, Andrew Yang and Beto O'Rourke before the debate.

From left, Joe Biden, Elizabeth Warren, Kamala Harris, Andrew Yang and Beto O'Rourke before the debate.   (Eric Gay / Associated Press)

From left, 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, former Texas Rep. Beto O'Rourke and former Housing Secretary Julian Castro.

From left, 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, former Texas Rep. Beto O'Rourke and former Housing Secretary Julian Castro.  (David J. Phillip / Associated Press)

Election 2020 Debate

From left, 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, former Texas Rep. Beto O'Rourke and former Housing Secretary Julian Castro are introduced.  (Eric Gay / Associated Press)

The 10 candidates take the stage before Thursday's debate.

The 10 candidates take the stage before Thursday’s debate.   (Eric Gay / Associated Press)

From left, Bernie Sanders, Joe Biden and Elizabeth Warren.

From left, Bernie Sanders, Joe Biden and Elizabeth Warren.   (David J. Phillip / Associated Press)

Bernie Sanders, Joe Biden and Elizabeth Warren.

Bernie Sanders, Joe Biden and Elizabeth Warren.   (Eric Gay / Associated Press)

Bernie Sanders and Joe Biden before the debate.

Bernie Sanders and Joe Biden before the debate.   (David J. Phillip / Associated Press)

Elizabeth Warren and Kamala Harris.

Elizabeth Warren and Kamala Harris.   (David J. Phillip / Associated Press)

Audience members take their seats before the Democratic presidential primary debate Thursday, Sept. 12, 2019, at Texas Southern University in Houston.

Audience members take their seats before the Democratic presidential primary debate Thursday, Sept. 12, 2019, at Texas Southern University in Houston.  (Associated Press)

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