How Republican Opposition Research Dig Into Dems

June 20 (Bloomberg) -- Primary season is winding down and the 2014 general election is gearing up. Both sides of the aisle are digging deep into their opponents. In this installment of "Power Brokers," Bloomberg's Phil Mattingly takes an inside look of the Republican oppo research group America Rising and how they are transforming this dark art into big business. (Source: Bloomberg)

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