Republican Debate - Sparks Fl

The Republican presidential candidates have had heated exchanges in another televised debate, their first to feature questions submitted via video-sharing website YouTube. Among other topics, they clashed over immigration and the troop timetable in Iraq. They stood there in matching dark suits and white shirts on the stage in St. Petersburg, Florida - eight candidates who were so reluctant to engage the youthful, online generation that they had turned down an earlier invitation from YouTube. But now they were here, apparently determined to make the most of it. They turned what could have been another dull stage show into the most animated and entertaining GOP debate so far.