Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., speaks at a campaign rally, Tuesday, May 10, 2016, in Stockton, Calif.
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., speaks at a campaign rally, Tuesday, May 10, 2016, in Stockton, Calif. Rich Pedroncelli Associated Press
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., speaks at a campaign rally, Tuesday, May 10, 2016, in Stockton, Calif. Rich Pedroncelli Associated Press