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UNITED STATES - : Senators Bill Nelson, D-FL., and Bernie Sanders, I-VT., during a press conference on legislation to end excessive oil speculation on June 15, 2011. (Photo By Douglas Graham/Roll Call via Getty Images)

UNITED STATES - : Senators Bill Nelson, D-FL., and Bernie Sanders, I-VT., during a press conference on legislation to end excessive oil speculation on June 15, 2011. (Photo By Douglas Graham/Roll Call via Getty Images)

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