I think it looks like the Electoral College's partisan bias in the 2020 Presidential election is the largest bias since 1936. The data for this calculation is at dbaron.org/presidential-elec… . (Let me know if there's an error!)
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How do you handle Nebraska and Maine?
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Replying to @WatsonLadd
Treat the congressional districts as though they're separate states, for the purpose of their electoral votes. (Though the first time I calculated 2008 I messed that bit up!) Interestingly, the *difference* between the 2016 and 2020 tipping points was NE-2 becoming D-leaning.

Dec 15, 2020 · 2:27 AM UTC

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Replying to @davidbaron @WatsonLadd
IIRC Wasserman said NE-2 shifted more than any other electoral-vote-awarding-jurisdiction this cycle.
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I want someone (maybe me???) to build an infographic that has the @FiveThirtyEight snake chart, straightened out, for the last 6-8 elections (results, not forecasts), with lines showing how the states moved around between elections...
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Replying to @davidbaron @WatsonLadd
That is, NE-2 is the one "state" on the opposite side of the tipping point in 2020 (assuming you don't count the 1 electoral vote share of Wisconsin).