Democratic Party ..... 44.63%
Republican Party ..... 25.44%
No Party Preference ..... 24.95%
American Independent Party ..... 2.66%
Libertarian Party ..... 0.74%
Green Party ..... 0.48%
Peace and Freedom Party ..... 0.40%
Phil Willon of the Los Angeles Times (February 16, 2018) notes that California's independents will soon outnumber Republicans.
California law requires that a political party have at least 0.33% "of the total number of voters registered on the 154th day before the primary election or the 123rd day before the presidential general election" to maintain ballot status. So the LPC's ballot status seems safe for the foreseeable future.