California has an unusual primary process, since the passage of Prop 14: The top two vote getters are in the primary (regardless of party) face each other in the general election.
The prevailing view is that incumbent Democratic senator Dianne Feinstein will, by far, get the most votes in the Primary and that Republican Orly Taitz, the only other candidate with any name recognition, will come in second and face Feinstein in the general election. Read more at Ballot Access News where one commenter discounted the partial poll results for several reasons, including the margin of error and:
… [A] big portion of Orly’s support is among people under 25 making less than 25K per year and are single women with children. All demographics who either fail to vote come election day or are inconsistent in polls.