California held a special election to fill the vacant State Senate seat, 7th district, on March 17. Steve Glazer, a Democrat who has fought certain unions for the last several years, easily placed first, and a Democratic Assemblymember placed second. Since no one got as much as 50%, there will be a runoff in May between the two Democrats.
Eric McGhee has this analysis of the race. He points out that under the old system, in which California used a blanket primary for special elections between 1967 and 2010, Glazer would be in a runoff with the lone Republican in the race, and would have a much easier time in the runoff, because this district is predominantly Democratic, although not overwhelmingly so.