Difference to the national margin
1948: R+4.04%
1952: R+3.71%
1956: D+4.29%
1960: R+0.71%
1964: R+4.26%
1968: R+2.38%
1972: D+9.69%
1976: R+3.84%
1980: R+7.04%
1984: D+1.97%
1988: D+4.16%
1992: D+7.83%
1996: D+4.37%
2000: D+11.28%
2004: D+12.41%
2008: D+16.74%
2012: D+19.23%
California's Cold War Republicanism is greatly exaggerated on this forum. Let's look at the percentages from this era:
1952
Democratic: 42.3
Republican: 56.8
1956
Democratic: 44.3
Republican: 55.4
1960
Democratic: 49.6
Republican: 50.1
1964
Democratic: 59.1
Republican: 40.8
1968
Democratic: 44.7
Republican: 47.8
1972
Democratic: 41.5
Republican: 55.0
1976
Democratic: 47.6
Republican: 49.3
1980
Democratic: 35.9
Republican: 52.7
1984
Democratic: 41.3
Republican: 57.5
1988
Democratic: 47.6
Republican: 51.1
So, as we can see, there was always a sizable Democratic vote in California except when John Anderson took some former Carter supporters in 1980.