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Pennsylvania Senate

Pennsylvania Senate

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Pennsylvania House / Pennsylvania Senate

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EveryDistrict’s Legislative District Index (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 100 points (with the Democratic candidate receiving 100% of the vote); districts with a score of -100 would vote for statewide Republican candidates by 100 points (with the Republican candidate receiving 100% of the vote).

EveryDistrict divides winnable districts into three categories: Tier I, Tier II, and Tier III. Tier I districts lean Democratic but are held by a Republican state legislator (marked in yellow). Tier II districts lean slightly Republican, with a range of 0 up to -5 (marked in pink). Tier III districts lean slightly more Republican, with a range of -5 up to -10 (marked in red).

Dark blue districts are safe Democratic districts. These districts are held by Democrats and lean Democratic in their LDI. In the current political environment, we would expect to hold these seats. Red districts (including Tier III districts) receive a ranking of “R-Safe.” These districts are held by a Republican and have an LDI score of less than -5.

For more information about EveryDistrict’s LDI, please click here.

EveryDistrict is not endorsing candidates running for the Pennsylvania State Senate in 2018.