Mission Viejo, a California city in Orange County, had decided to use Cumulative Voting to elect all five of its city councilmembers in the 2020 election. However, on September 18, the California Secretary of state ruled that Cumulative Voting is not legal in California for general law cities.
Under Cumulative Voting, if there are five seats to be filled, a voter has five votes, but he or she can spread them around so as to give two votes to one candidate, and three votes to another candidate, if the voter votes for only two candidates. The voter can even give all five votes to a single candidate.
No city in California has ever used Cumulative Voting.