Republican U.S. Sen. Scott Brown (left) answers a question during a debate against Democratic challenger Elizabeth Warren on Monday at the University of Massachusetts in Lowell, Mass. Matt Stone/AP hide caption

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Bill Connell of Weymouth, Mass., who supports Republican Sen. Scott Brown, stands near signs supporting Brown's Democratic challenger, Elizabeth Warren, before the candidates' first debate Thursday in Boston. Michael Dwyer/AP hide caption

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Massachusetts Senate candidate Elizabeth Warren is shown here attending a 2010 Capitol Hill hearing on the Troubled Asset Relief Program. Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images