What is the reason Bernie Sanders easily won the primary in Northampton and Amherst MA, but lost Hacienda Heights, CA; and Long Beach, CA was very competitive?
In California, I think the primary may have split more on income than race. Bernie won the most diverse city in America, Oakland, but badly lost the rich mostly white city of Piedmont that it surrounds.
Similiarly, Bernie won Xavier Becerra's almost entirely Hispanic district in LA, while getting annihilated in the mostly white Santa Monica district.