Republican senator Scott Brown of Massachusetts has a new 60-second ad touting his bipartisan, moderate record in the United States Senate. "I've kept my promise to be an independent voice," Brown says in the ad. "I put people ahead of politics. And now, I need your help to keep that independent tradition alive in Massachusetts." Watch the ad below:

According to the Real Clear Politics poll average, Brown's Democratic opponent, Harvard law professor Elizabeth Warren, leads by 4.5 points.

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