The Republican candidates
Media playback is unsupported on your device
Video

Republicans face off in Florida

US Republicans Mitt Romney and Newt Gingrich traded barbs in a national debate in the US state of Florida, ahead of the primary vote there.

In two polls released on Monday, Mr Gingrich's lead among likely Florida voters grew to as much as 9%.

Fellow candidates Rick Santorum, a former senator, and Texas Congressman Ron Paul also took to the stage on Monday.

Jonathan Blake reports.

Go to next video: Gingrich triumphs in South Carolina