Photos: Democrats hold first presidential debate

Democratic presidential candidate former Maryland Gov. Martin O'Malley speaks during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher) — Democratic presidential candidate former Maryland Gov. Martin O’Malley speaks during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

Former Virginia Sen. Jim Webb speaks during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

Former Rhode Island Gov. Lincoln Chafee speaks during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

Hillary Rodham Clinton, right, listens as Sen. Bernie Sanders, of Vermont, speaks during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher

Democratic presidential candidates from left, former Virginia Sen. Jim Webb, Sen. Bernie Sanders, of Vermont, Hillary Rodham Clinton, former Maryland Gov. Martin O'Malley, and former Rhode Island Gov. Lincoln Chafee take the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. On the far left is moderator Anderson Cooper. (AP Photo/John Locher) — Democratic presidential candidates from left, former Virginia Sen. Jim Webb, Sen. Bernie Sanders, of Vermont, Hillary Rodham Clinton, former Maryland Gov. Martin O’Malley, and former Rhode Island Gov. Lincoln Chafee take the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. On the far left is moderator Anderson Cooper. (AP Photo/John Locher)

Democratic presidential candidate Hillary Rodham Clinton takes the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher

What happens in Vegas...is I watch @HillaryClinton prove she's the most qualified candidate for POTUS. #ImWithHer pic.twitter.com/ax1d56Whwt
— Bill Clinton (@billclinton) October 14, 2015

(AP Photo/John Locher)

Sen. Bernie Sanders, of Vermont,, left, and Hillary Rodham Clinton laugh during the CNN Democratic presidential debate, Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher

Hillary Rodham Clinton, right, and Sen. Bernie Sanders, of Vermont, speak during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher

The #DemDebate is still going, and there's still a good crowd watching here @WTOP @UnionPub @PredictIt_ pic.twitter.com/GyknJKXyiB
— Michelle Basch (@mbaschWTOP) October 14, 2015

(AP Photo/John Locher)

Members of the media work as Hillary Rodham Clinton speaks during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/David Becker)

Sorry, there is no STAR on the stage tonight!
— Donald J. Trump (@realDonaldTrump) October 14, 2015

(AP Photo/David Becker)

Hillary Rodham Clinton, left, and former Maryland Gov. Martin O’Malley speak during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher

O'Malley calls Trump a "carnival barker" while promoting that Maryland gives in-state tuition to illegal immigrants @WTOP #DemDebate
— Michelle Basch (@mbaschWTOP) October 14, 2015

(AP Photo/John Locher)

Democratic presidential candidate Hillary Rodham Clinton waves as she takes the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/David Becker)

AP Photo/David Becker

Sen. Bernie Sanders, of Vermont, speaks during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher

Hillary Rodham Clinton speaks during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher

Just some of the @PredictIt_ #DemDebate drinking game rules @WTOP @UnionPub pic.twitter.com/Tn9JE1hbQl
— Michelle Basch (@mbaschWTOP) October 14, 2015

(AP Photo/John Locher)

Democratic presidential candidates from left, former Virginia Sen. Jim Webb, Sen. Bernie Sanders, of Vermont, Hillary Rodham Clinton, former Maryland Gov. Martin O’Malley, and former Rhode Island Gov. Lincoln Chafee take the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher

Former Maryland Gov. Martin O’Malley, right, speaks as Hillary Rodham Clinton listens during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher

Sheryl Crow, left, sings the National Anthem as Democratic presidential candidates from left, former Virginia Sen. Jim Webb, Sen. Bernie Sanders, of Vermont, Hillary Rodham Clinton, former Maryland Gov. Martin O'Malley, and former Rhode Island Gov. Lincoln Chafee take the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher) — Sheryl Crow, left, sings the National Anthem as Democratic presidential candidates from left, former Virginia Sen. Jim Webb, Sen. Bernie Sanders, of Vermont, Hillary Rodham Clinton, former Maryland Gov. Martin O’Malley, and former Rhode Island Gov. Lincoln Chafee take the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

Democratic presidential candidates from left, former Virginia Sen. Jim Webb, Sen. Bernie Sanders, of Vermont, Hillary Rodham Clinton, former Maryland Gov. Martin O’Malley, and former Rhode Island Gov. Lincoln Chafee take the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher

Democratic presidential candidates from left, former Virginia Sen. Jim Webb, Sen. Bernie Sanders, of Vermont, Hillary Rodham Clinton, former Maryland Gov. Martin O’Malley, and former Rhode Island Gov. Lincoln Chafee take the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)

AP Photo/John Locher