Funny, I see him doing well there...
I don’t see how: SurveyUSA (most accurate pollster) had Sanders down 18 in California just a couple of days ago.
Furthermore, Sanders mostly only wins small states and caucuses. All the largest states (NY, FL, TX) have been overwhelmingly for Clinton; Florida and Texas both by over 30 points. As with TX/FL/NY, the heavy minority demographic in California bodes well for Clinton.