Wisconsin House / Wisconsin Senate
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2020 Election Update
Heading into the 2020 election, Republicans controlled the Wisconsin Senate 19 to 14. Democrats lost two seats (SDs 10 and 30) for a net loss of two seats. Republicans now control the chamber 21 to 12.
The below table shows 2020 and 2018 election results for the Wisconsin Senate. The LDI scores are for the 2020 cycle. EveryDistrict will release new scores and district rankings after the redistricting process.
2018 Election Update
After the 2016 election, Republicans controlled the Wisconsin State Senate 20-13. Democrats picked up two seats in special elections following the 2016 election: SD 1 in a special election held in June 2018 and SD 10 in a special election held in January 2018.
In the 2018 election, Caleb Frostman lost the seat he won in June 2018, leading to a one-seat loss for Democrats. Republicans now control the chamber 19-14.
Understanding the Map
EveryDistrict’s Legislative District Index (LDI) is the gold standard of state legislative competitiveness. Our LDI ranks state legislative districts on a scale from 100 to -100, using statewide elections data. Districts with a score of 100 would vote for statewide Democratic candidates by an average of 100 points (with the Democratic candidate receiving 100% of the vote); districts with a score of -100 would vote for statewide Republican candidates by an average of 100 points (with the Republican candidate receiving 100% of the vote). For a more realistic example, a district with a score of 10 would vote for statewide Democratic candidates by an average of 10 points (meaning we would expect the Democratic state legislative candidate to win with 55% of the vote compared to the Republican winning 45% of the vote).
After the 2018 election, EveryDistrict reviewed and enhanced our LDI system, improving the accuracy of the metric with new methodologies and the most recent electoral data.
For more information about EveryDistrict’s LDI, please click here.