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PHILADELPHIA, PA - JULY 26: A screen displays Sen. Bernie Sanders embracing his wife Jane O'Meara Sanders after the Vermont delegation cast their votes during roll call on the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania. Democratic presidential candidate Hillary Clinton received the number of votes needed to secure the party's nomination. 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)

PHILADELPHIA, PA - JULY 26:  A screen displays Sen. Bernie Sanders embracing his wife Jane O'Meara Sanders after the Vermont delegation cast their votes during roll call on the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania. Democratic presidential candidate Hillary Clinton received the number of votes needed to secure the party's nomination. 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)