The California gubernatorial primary is a so-called “jungle” primary, meaning that all candidates, from any party, run against one another in a single election.

California’s race for governor is still too early to call with more than half of the vote counted.

Recent polls show three candidates clustered at the top: Xavier Becerra, drawing the support of moderate Democrats; Tom Steyer, a billionaire who talks of more taxes on the rich; and Steve Hilton, a f...