PBS NewsHour: In Michigan, Romney 'Is Going to Have to Fight for His Life' vs. Santorum

Several national polls now show GOP hopeful Rick Santorum in a new dead heat with longtime front-runner Mitt Romney. Gwen Ifill discusses Santorum's rise and efforts to win Michigan's Feb. 28 primary with The Washington Post's Dan Balz and Bill Ballenger of the Inside Michigan Politics newsletter.

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