Sanders' Last Stand: New2016Updates057

Presidential candidate, Bernie Sanders is greeted by grandchildren, Ella Driscoll and Dylan Driscoll before he spoke at a rally at the Los Angeles Memorial Coliseum Olympic Plaza on Saturday June 04, 2016 in Los Angeles, CA. The primary in California is June 7th. (Photo by Matt McClain/ The Washington Post)

Presidential candidate, Bernie Sanders is greeted by grandchildren, Ella Driscoll and Dylan Driscoll before he spoke at a rally at the Los Angeles Memorial Coliseum Olympic Plaza on Saturday June 04, 2016 in Los Angeles, CA. The primary in California is June 7th. (Photo by Matt McClain/ The Washington Post)