Bernie Sanders campaigning in San Bernardino, Calif. (12 images)

Democratic presidential candidate Bernie Sanders addresses supporters during a rally at the National Orange Show Events Center in San Bernardino, Calif., on May 24, 2016. Sanders and former Secretary of State Hillary Clinton appeared at a series of local events two weeks before the California primary in an effort to court Southland voters.

Democratic presidential candidate Bernie Sanders is greeted with a hug by a supporter after addressing a rally at the National Orange Show Events Center in San Bernardino, Calif., on May 24, 2016. Photo by Jim Ruymen/UPI

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Democratic presidential candidate Bernie Sanders addresses supporters during a rally at the National Orange Show Events Center in San Bernardino, Calif., on May 24, 2016. Photo by Jim Ruymen/UPI

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Democratic presidential candidate Bernie Sanders addresses supporters during a rally at the National Orange Show Events Center in San Bernardino, Calif., on May 24, 2016. Photo by Jim Ruymen/UPI

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Democratic presidential candidate Bernie Sanders is greeted by supporters after addressing a rally at the National Orange Show Events Center in San Bernardino, Calif., on May 24, 2016. Photo by Jim Ruymen/UPI

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