From CBS News' Scott Conroy:
The Republican candidates have taken the stage in Johnston, Iowa, for the final debate before the January 3 caucuses. The candidates are being introduced now.
The filing room is overflowing with reporters, as members of the media continue to stream in due to late-arriving flights that were held up by the weather. The streets of Des Moines look like a scene from a winter fairy tales this morning, as yesterdays storm has left a glistening sheet of ice across the region.
All eyes are on Romney and Huckabee today as the former Massachusetts governor tries to regain his footing against the new Iowa frontrunner. It's safe to say that this debate will not be as low-key as last weekend's Univision forum in Florida. Everyone here is expecting the sparks to start flying early.
CBSNews.com is live blogging the debate HERE.