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UNITED STATES - August 16: Sen. Bernie Sanders, D-Vt., speaks at the Loras College Athletic and Wellness Center in Dubuque, Iowa, on Sunday, August 16, 2015. The "town meeting," was the fourth campaign event of the day for Sanders. (Photo By Al Drago/CQ Roll Call)

UNITED STATES - August 16: Sen. Bernie Sanders, D-Vt., speaks at the Loras College Athletic and Wellness Center in Dubuque, Iowa, on Sunday, August 16, 2015. The "town meeting," was the fourth campaign event of the day for Sanders. (Photo By Al Drago/CQ Roll Call)

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