Republican Sen. Scott Brown has jumped to a five-point lead over Democratic challenger Elizabeth Warren in Massachusetts, where the pair is competing in one of the most competitive and critical U.S. Senate races in the country.Brown attracts 49 percent of the support from likely voters in the Bay State, according to a new Public Policy Polling (D) survey, while Warren garners 44 percent. Independent voters bolster Brown's lead, supporting him over Warren by 58 percent to 32 percent. The first-term senator also appears to have some crossover appeal: 20 percent of Democrats back him while...

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