Candidates face off in Detroit on Night 1 of the second Democratic debate

Tuesday’s candidates on stage.   (Carlos Osorio / Associated Press )

The scene at the Fox Theater in Detroit before Tuesday’s Democratic presidential debate.   (Brendan Smialowski / AFP/Getty Images)

The Democratic candidates take the stage for Tuesday’s debate.   (Justin Sullivan / Getty Images )

The candidates on stage, from left: Marianne Williamson, Tim Ryan, Amy Klobuchar, Pete Buttigieg, Bernie Sanders, Elizabeth Warren, Beto O’Rourke, John Hickenlooper, John Delaney and Steve Bullock.  (Paul Sancya / Associated Press )

Moderators Don Lemon, left, Dana Bash and Jake Tapper prepare for Tuesday’s debate.   (Brendan Smialowski / AFP/Getty Images)

Tuesday’s candidates on stage.   (Jim Watson / AFP/Getty Images)

Sen. Elizabeth Warren (D-Mass.) greets supporters as she arrives on stage.   (Carlos Osorio / Associated Press )

Members of the media before the debate.   (Jeff Kowalsky / AFP/Getty Images)

The candidates on stage during Tuesday’s debate.   (Paul Sancya / Associated Press )

From left, Tim Ryan, Amy Klobuchar, Pete Buttigieg, Bernie Sanders , Elizabeth Warren, Beto O’Rourke, and John Hickenlooper.   (Justin Sullivan / Getty Images)

Sen. Elizabeth Warren  (Paul Sancya / Associated Press)

Sen. Bernie Sanders  (Paul Sancya / Associated Press )

Marianne Williamson   (Paul Sancya / Associated Press )

Rep. Tim Ryan  (Paul Sancya / Associated Press )

Pete Buttigieg, left, and Bernie Sanders  (Brendan Smialowski / AFP/Getty Images)

Bernie Sanders and Elizabeth Warren  (Brendan Smialowski / AFP/Getty Images)

Elizabeth Warren and Beto O’Rourke  (Brendan Smialowski / AFP/Getty Images)

Former Rep. Beto O’Rourke, flanked by Sen. Elizabeth Warren former Colorado Gov. John Hickenlooper.  (Justin Sullivan / Getty Images)

Amy Klobuchar and Pete Buttigieg  (Justin Sullivan / Getty Images)

Elizabeth Warren  (Brendan Smialowski / AFP/Getty Images)

From left, Pete Buttigieg, Bernie Sanders, Elizabeth Warren, Beto O’Rourke and John Hickenlooper.  (Brendan Smialowski / AFP/Getty Images)

Pete Buttigieg  (Brendan Smialowski / AFP/Getty Images)

John Delaney and Steve Bullock  (Brendan Smialowski / AFP/Getty Images)

Marianne Williamson  (Brendan Smialowski / AFP/Getty Images)

From left, Bernie Sanders, John Hickenlooper, Elizabeth Warren, Beto O’Rourke and John Delaney.  (Justin Sullivan / Getty Images)

Bernie Sanders and Elizabeth Warren  (Brendan Smialowski / AFP/Getty Images)

People line up to attend Tuesday’s debate.   (Scott Olson / Getty Images)

Mounted police officers work the area outside the debate in Detroit.   (Justin Sullivan/ Getty Images )

A balloon mocking President Trump appears near the debate hall.   (Brendan Smialowski / AFP/Getty Images)

Pro-Trump demonstrators rally near the debate hall.   (Carlos Osorio / Associated Press )

A Detroit officer and police dog patrol outside Fox Theatre.   (Justin Sullivan / Getty Images)

Kelly Jacobs of Mississippi waits in line for Tuesday’s debate.   (Scott Olson / Getty Images)

Demonstrators rally before the debate in Detroit.   (Jeff Kowalsky / AFP/Getty Images)