New York magazine has this story on California general election ballots in California. For the partisan offices, except for president, there are no Republican candidates in portions of Los Angeles County that have over 800,000 registered voters. Thanks to Carla Marinucci for the link.
The California Republican Party officially opposed top-two when it was on the ballot in June 2010, and also when it was on the ballot in November 2004. However, the 2010 top-two effort was pushed through the legislature by Republican State Senator Abel Maldonado and Governor Arnold Schwarzenegger. In the ballot measure campaign, the chief funder for the top-two measure was Charles T. Munger, Jr., a Republican Party officer in Santa Clara County.