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Senator Bernard Sanders (I-VT) speaks as protesters gather to advocate for an increase in pay to $15 USD per hour, as part of a 'Fight for $15' labor effort on Capitol Hill April 22, 2015 in Washington, DC. AFP PHOTO/BRENDAN SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)

Senator Bernard Sanders (I-VT) speaks as protesters gather to advocate for an increase in pay to $15 USD per hour, as part of a 'Fight for $15' labor effort on Capitol Hill April 22, 2015 in Washington, DC. AFP PHOTO/BRENDAN SMIALOWSKI        (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)