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Republican Front-Runners Get Nasty

Friday, 9 Dec 2011 | 7:00 PM ET

CNBC's Larry Kudlow discusses tomorrow's Iowa Republican debate, and looks at Mitt Romney's attack ads targeting Newt Gingrich, with Robert Costa, National Review; Tony Fratto, Hamilton Place Strategies; John McLaughlin, Republican pollster; and Dan Gerstein, Gotham Ghostwriters.