Hillary did beat Obama in the 2008 California primary, so she might not do as bad in CA as people think.
Check out the CA 2008 primary exit poll , she demolished Obama among Hispanics interestingly enough.
% of total Clinton Obama Edwards
25 White men 33 60 5
28 White women 53 40 6
13 Latino men 62 37 1
16 Latino women 69 30 0
26 Today/In the last three days 47 49 4
http://politics.nytimes.com/election-guide/2008/results/states/CA.html
Yeah, the "Hillary can't appeal to minorities like Obama can" myth is quite adorable.