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PROVIDENCE, RI - APRIL 24: Democratic presidential candidate, U.S. Sen. Bernie Sanders (D-VT) speaks during a rally at Roger Williams Park on April 24, 2016 in Providence, Rhode Island. A crowd of more than 7,000 attended the event, according to campaign officials. (Photo by Scott Eisen/Getty Images)

PROVIDENCE, RI - APRIL 24:  Democratic presidential candidate, U.S. Sen. Bernie Sanders (D-VT) speaks during a rally at Roger Williams Park on April 24, 2016 in Providence, Rhode Island. A crowd of more than 7,000 attended the event, according to campaign officials.  (Photo by Scott Eisen/Getty Images)