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PBS News Hour
Romney Accuses Santorum of 'Dirty Tricks' in Wooing Dems
Struggling against an aggressive challenge in his home state of Michigan, GOP hopeful Mitt Romney on Tuesday accused rival Rick Santorum of "dirty tricks" in courting Democratic cross-over votes with automated robocalls. Gwen Ifill discusses what to look for in the primary results with Bill Ballenger of Inside Michigan Politics.
