Amy E Walter, via The Bird
(Emojis mine)
โWant to understand why/how swing seats have disappeared over last 25 years?
#Redistrict and #CookPolitical have you covered. โฆ
Some key takeaways:
* urban/rural polarization has driven most of the competitive decline.
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* elections have produced the biggest increase in strongly Democratic seats, while redistricting has swelled the number of strongly Republican seats.โ
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โญ๏ธ
For more than 25 years, the Cook Partisan Voting Index (PVI) has served as a useful metric to compare the partisan leanings of all 435 House seats and 50 states. Today, we're publishing historical PVI values for every set of congressional districts dating back to 1997 โ all in one place. Together, the data illustrate how polarization and shifting boundaries have cut swing seats in half, profoundly altering House members's electoral incentives.