On December 18, Civic Lens Research released a California gubernatorial poll. The three leading contenders are: Steve Hilton 17.8%, Chad Bianco 13.9%, and Eric Swalwell 12.2%. See here.
Hilton and Bianco are Republicans.
A Sacramento Bee news story about this poll that is behind a pay wall says that Democratic Party leaders anticipate spending a large amount of money to simultaneously boost one of the two leading Republicans, and tear down the other one. That would presumably lessen the chances that both Republicans would place first and second. The story doesn’t say which of the two Republicans would get the boost and which one would be attacked.