First Democratic presidential debate of 2016 (22 images)

Democratic presidential candidates former Secretary of State Hillary Clinton and Sen. Bernie Sanders participate in the Democratic presidential primary debate at the Gaillard Center in Charleston, South Carolina on January 17, 2016. Photo by Kevin Dietsch/UPI

Democratic presidential candidates former Secretary of State Hillary Clinton, Sen. Bernie Sanders and former Gov. Martin O'Malley (D-MD) stand together on stage following the Democratic presidential primary debate at the Gaillard Center in Charleston, South Carolina on January 17, 2016. Photo by Kevin Dietsch/UPI

Democratic presidential candidates former Secretary of State Hillary Clinton and former Gov. Martin O'Malley (D-MD) shakes hands following the Democratic presidential primary debate at the Gaillard Center in Charleston, South Carolina on January 17, 2016. Photo by Kevin Dietsch/UPI

Democratic presidential candidates former Secretary of State Hillary Clinton (C), Sen. Bernie Sanders (R) and former Gov. Martin O'Malley (D-MD) arrive on stage during the Democratic presidential primary debate at the Gaillard Center in Charleston, South Carolina on January 17, 2016. Photo by Kevin Dietsch/UPI

Democratic presidential candidates former Secretary of State Hillary Clinton and Sen. Bernie Sanders talk of during a break at the Democratic presidential primary debate at the Gaillard Center in Charleston, South Carolina on January 17, 2016. Photo by Kevin Dietsch/UPI

Democratic presidential candidate Sen. Bernie Sanders strains to listen to a question during the Democratic presidential primary debate at the Gaillard Center in Charleston, South Carolina on January 17, 2016. Photo by Kevin Dietsch/UPI

Democratic presidential candidate former Secretary of State Hillary Clinton participates in the Democratic presidential primary debate at the Gaillard Center in Charleston, South Carolina on January 17, 2016. Photo by Kevin Dietsch/UPI