Cities that were less Democratic (% Obama) than their county

[Sbane]

For Santa Clara County you basically have Palo Alto and the cities around there being very liberal. Those areas are basically an extension of San Mateo County. They voted to legalize gay marriage by a large margin and also voted to legalize Marijuana. San Jose on the other hand is much more moderate (doesn't have much to do with income). Also the Vietnamese live in San Jose, though I wouldn't overemphasize that.

For Contra Costa County, you have the inner east bay along interstate 80 which is the inner city/working class areas. Concord is basically outer east bay suburbia, but still pretty Democratic since it's not that high income by Bay Area standards. Walnut Creek is even more Republican and it's a fairly large city, but has a higher income. But then you have Orinda and Lafayette which are even richer and even more Democratic. Those people are just Oakland hills liberals who wanted a better school district.