Fluke, who came in to the race with the highest name recognition of any of the five candidates running for California's 26th Senate District, was bested by Ben Allen, a member of the Santa Monica-Malibu Unified School District board, who edged out Fluke with 21.9 percent of the vote to Fluke's 19.4 percent.
Allen was not particularly well-known when he entered the race, despite having a strong base in a populous area of the district. He was helped considerably by wealthy businessman (and former Republican) Bill Bloomfield, who donated about $600,000 on the race.
Fluke and Allen will compete again in the November general election without a Republican opponent.
Correction: This post has been updated to correct that there is no runoff for the party nomination. In California, the two candidates with the most votes, regardless of party, advance to the general election in November.