U.S. Senator Scott Brown and Democratic challenger Elizabeth Warren clashed on several issues during their second debate last night held at the University of Massachusetts Lowell campus.  Brown says he's a nonpartisan Senator who votes the best interests of Massachusetts, not along party lines.

Warren counters that she has a record of bipartisanship and will work cooperatively on issues to help working families.

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The race is being watched closely nationally as Democrats hope to maintain control of the Senate, while Republicans hope to become the majority party.