Bernie Sanders stumps for Proposition 61, a drug price measure on the Nov. 8 ballot in San Francisco on Oct. 15, 2016.
Bernie Sanders stumps for Proposition 61, a drug price measure on the Nov. 8 ballot in San Francisco on Oct. 15, 2016. AP Images; for the AIDS Healthcare Foundation Tomas Ovalle
Bernie Sanders stumps for Proposition 61, a drug price measure on the Nov. 8 ballot in San Francisco on Oct. 15, 2016. AP Images; for the AIDS Healthcare Foundation Tomas Ovalle