It,s a big if but if Romney comes on strong with the hispanic vote it could be possible.

the 2008 election was close percentage wise in some counties Obama took in 08. If Romney could pull off Los Angeles hispanic voters would be a plus. But statewide is what counts.

California has a heavy hispanic population. Add the republican voters in with a strong hispanic vote for Romney.

Maybe

http://quickfacts.census.gov/qfd/states/06000.html
excerpt:
White persons, percent, 2010 (a)  57.6% 72.4%
  Black persons, percent, 2010 (a)  6.2% 12.6%
  American Indian and Alaska Native persons, percent, 2010 (a)  1.0% 0.9%
  Asian persons, percent, 2010 (a)  13.0% 4.8%
  Native Hawaiian and Other Pacific Islander, percent, 2010 (a)  0.4% 0.2%
  Persons reporting two or more races, percent, 2010  4.9% 2.9%
  Persons of Hispanic or Latino origin, percent, 2010 (b)  37.6% 16.3%
  White persons not Hispanic, percent, 2010  40.1% 63.7%
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http://www.uselectionatlas.org/RESULTS/state.php?year=2008&fips=6&f=0&off=0&elect=0
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If Romney could pull the hispanic votr in Los Angeles county would be big
http://www.city-data.com/city/Los-Angeles-California.html