In 2018, two candidates for San Francisco mayor caused a kerfuffle when they were accused of trying to “game” the city’s ranked-choice voting system by encouraging voters to rank the two of them first and second (in whichever order they preferred). Mayoral ballots only had room to rank three candidates, so if voters followed the suggestion, they could have knocked a more moderate candidate out in a runoff round. It didn’t work. The candidate considered more moderate, London Breed, is now San Francisco mayor.
Article source: https://www.huffpost.com/entry/ranked-choice-voting-what-to-know_n_60cb4e67e4b01e411395cc78