Tonight, the final four remaining GOP candidates have one last chance to stake their positions for voters ahead of Saturday's crucial South Carolina primary. 

The debate will be an important test for Mitt Romney, especially as he looks to maintain his frontrunner spot as Newt Gingrich closes in on the lead.

The debate follows a wild day in election news, as it was announced today Romney had in fact lost the Iowa caucus to Rick Santorum, Texas Governor Rick Perry dropped out of the race, and Gingrich was accussed by his ex-wife of seeking an open marriage so he could maintain a relationship with his mistress.

You can watch the debate broadcast here: http://www.cnn.com/video/#/video/cvplive/cvpstream1

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