Dummymandering

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Dummymandering is a term used in the United States to describe a gerrymandering effort intended to favor a certain political party, but which backfires by benefiting another party instead. It combines the words "dummy" and "gerrymandering". This typically occurs during a wave election for the party that was intended to be disfavored by the map, when districts are drawn with potentially competitive margins, or when maps are drawn without consideration for long term partisan shifts, or where shifts happen unexpectedly over the period of the map's utilization despite being initially unforeseen. Dummymandering is caused when map makers attempt to crack votes, such as splitting large population centers into multiple districts relative to the population. Using too few districts to properly split up a large population center can cause the partisan lean of a district to be competitive in certain political environments, where potentially more seats will go to the party that was aimed to be disadvantaged...

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