Follow this CNN Republican debate live blog for all the best moments from the last GOP debate of 2015 on the stage and on social media.
Live updates from the Republican debate
Nine Republican presidential candidates are on the CNN debate stage for the final political showdown of the year, in a two-hour prime-time event likely to be dominated by national security and terrorism. Watch live on CNN TV or, if you're in the United States, try CNNgo.
Your host for the evening is CNN Politics reporter Tal Kopan and as you're following the event, use #GOPDebate to engage with all the action on social media.