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Sen. Bernie Sanders (I-VT) delivers remarks on the first day of the Democratic National Convention at the Wells Fargo Center, July 25, 2016 in Philadelphia, Pennsylvania. An estimated 50,000 people are expected in Philadelphia, including hundreds of protesters and members of the media. The four-day Democratic National Convention kicked off July 25.  (Photo by Alex Wong/Getty Images)
Sen. Bernie Sanders (I-VT) delivers remarks on the first day of the Democratic National Convention at the Wells Fargo Center, July 25, 2016 in Philadelphia, Pennsylvania. An estimated 50,000 people are expected in Philadelphia, including hundreds of protesters and members of the media. The four-day Democratic National Convention kicked off July 25.  (Photo by Alex Wong/Getty Images)

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Bernie Sanders' backs Hillary Clinton in DNC speech

Sen. Bernie Sanders addresses the Democratic National Convention and delivers the full-throated endorsement that the Hillary Clinton campaign had longed for.

Bernie Sanders' backs Hillary Clinton in DNC speech

Sen. Bernie Sanders addresses the Democratic National Convention and delivers the full-throated endorsement that the Hillary Clinton campaign had longed for.