The three Democratic presidential candidates are gathering in Charleston, S.C., on Sunday evening for their fourth debate, and their final face-off before 2016 voting kicks off with the Feb. 1 Iowa caucuses.
All eyes will once again be on the rivalry between former Secretary of State Hillary Clinton and Vermont Sen. Bernie Sanders, after former Maryland Gov. Martin O'Malley just barely qualified for the debate. Clinton remains the national front-runner, but her advantage has narrowed in recent days, with Sanders overtaking her in one Iowa poll and continuing to hold an edge in New Hampshire.
The 9 p.m. E.T. debate aired on NBC and streamed on YouTube. See highlights from the last debate above.