Senator Bernie Sanders Holds News Conference After Announcing Presidential Run [Getty Images]

Senator Bernie Sanders, an Independent from Vermont, speaks during a news conference outside the U.S. Capitol Building in Washington, D.C., U.S., on Thursday, April 30, 2015. Sanders said Wednesday that he will seek the Democratic nomination for president in 2016, setting up a progressive challenge to frontrunner Hillary Clinton. Photographer: Andrew Harrer/Bloomberg via Getty Images

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