Republican debate: Live updates

Welcome to the CNN live blog, where we'll be bringing you all the best moments from the first Republican debate of the election year.

Your host for the evening is CNN Politics reporter Tal Kopan, who will also be bringing you insights from the whole CNN political team, both in North Charleston, South Carolina, and Washington, D.C.
As you're following the event, use #GOPDebate to engage with all the action on social media.