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 candidate Sen. Bernie Sanders participates 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 candidate former Secretary of State Hillary Clinton arrives 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