The debate over the domestic violence law not only gives Brown a chance to make a more personal connection with women voters, but it also lets him again cast himself as a bipartisan bridge-builder.
Brown has embraced the role, highlighting areas where he agrees with Obama and issues where he's split with fellow Republicans. That independent streak is seen as critical for Brown's re-election in a state where Democrats dominate the congressional delegation.
Brown won the praise of Democratic Sen. Dianne Feinstein of California, who thanked him for voicing his support of the domestic violence bill.
"I believe this bill will be before us shortly and Sen. Brown, we will count on your vote," she said Wednesday.
Brown is facing a tough re-election campaign to keep the Senate seat formerly held by the late Sen. Edward Kennedy until his death in 2009 from brain cancer. Brown won a special election to fill the seat in 2010.
Recent polls show a tight contest between Brown and Warren, both of whom have been stockpiled millions of dollars for what could turn out to be the costliest Senate race in Massachusetts history.
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