Good to learn about LaMirada, a town I always liked. I am really rather surprised that the West end of the SF Valley aren't GOP, but I have been away from the LA area for almost 3 decades.
I suspect that maybe the GOP in the City of Los Angeles is now coralled in Porter Ranch (a high income enclave in Northride), and Chatsworth. When I was a kid, West LA north of Pico Blvd elected GOP types, along with the San Fernando Valley south of the Ventura Blvd. That was in the 1960's. That all ended in the 1970's.