California does have some less-common voting systems in play - on my San Francisco ballots, the two interesting things I've seen:
- IRV is commonly used for local positions
- Other positions seem to use a system where all the political parties have the same primary, and then only the top two candidates are on the ballot for the general election. Wikipedia describes it well:
> Under California's non-partisan blanket primary law, all candidates appear on the same ballot, regardless of party. In the primary, voters may vote for any candidate, regardless of their party affiliation. In the California system, the top two finishers—regardless of party—advance to the general election in November, even if a candidate receives a majority of the votes cast in the primary election. Washington and Louisiana have similar "jungle primary" style processes for U.S. Senate elections, as does Mississippi for U.S. Senate special elections.
source: https://en.wikipedia.org/wiki/2018_United_States_Senate_elec...
Every senate election I can recall in California has been Democrat v Democrat by the general election.