Democrats Square Off in First 2016 Presidential Debate

Get live updates of what the Democratic candidates are up to on debate day.

Tonight marks Hillary Clinton's first return to the debate stage in seven years.

CNN Anchor Anderson Cooper will moderate the debate. Coverage begins at 8:30 p.m. Eastern time and the debate starts at 9:00 p.m. Eastern.

Keep checking back for updates from our ABC News politics team as the five candidates prep for the debate, when the candidates take the stage, and when they take on the spin room.