In 2008, the voters of Santa Fe, New Mexico, voted to use ranked choice voting for city elections. However, the city is still not using ranked choice voting. On August 30, Fairvote New Mexico sued the city over its failure to implement that system. See this story.
The case is filed in the State Supreme Court, and is State ex rel Perez v City Council of Santa Fe. The court hasn’t decided yet whether to accept the case. Thanks to Electionline for this news.