The may 30 Santa Cruz Sentinel has this editorial, suggesting that California’s “top-two open primary” system, passed by the voters in June 2010, is not necessarily a helpful idea. The Sentinel endorsed Proposition 14 back in 2010.
Also of interest in this Mother Jones story about the U.S. Senate race in California. The article is one of the few that actually covers this race in any detail. The article describes nine of the 24 candidates in that race.