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The most important number for Bernie Sanders next week: 256

Bernie Sanders' delegate math is largely built on fantasy. If he actually wants to stop Hillary Clinton, here's what he'd have to do.

Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks during a campaign rally at the Cubberley Community Center, June 1, 2016, in Palo Alto, Calif. (Photo by Noah Berger/AP)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks during a campaign rally at the Cubberley Community Center, June 1, 2016, in Palo Alto, Calif.AP

Alex Seitz-Wald