Patrick Little, who is running as a Republican, is polling at 18 percent behind Feinstein, a Democrat who has served more than four terms in the Senate. Feinstein is polling at 39 percent in the race, which will pit the top-two vote-getters against each other in the general election in November.
The primary is set for June 5.
Little has been endorsed by former Ku Klux Klan leader David Duke, but has complained that “alt-right” media outlets such as The Daily Stormer have not been supportive of his campaign.
Right Wing Watch outed Little’s white supremacist views in an article last week.
In a campaign video posted to YouTube earlier this week, Little said he “woke up to the Jewish question and dedicated my life to exposing these Jews that control our country.”