Vicki Kennedy and Senator Scott Brown – representatives of the old and new guard in Massachusetts politics – reached a standoff in an escalating battle of wills on Tuesday, all but dooming a high-profile US Senate debate in the fall. The struggle between the two, who have had a tumultuous relationship, has become a focal point in the Senate race, nearly overshadowing the main contest between Brown, a Republican, and Elizabeth Warren, a Democrat and Harvard Law School professor.
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