I thought the Dems did better in 2018 as a backlash to efforts at dumping Obamacare, the pendulum swung back a little in favor of the GOP
Well in 2018, it seems like the Democrat activated like 80% of their base, and Republicans activated like 70%. Now both have pulled out 95%. In red districts, that means Democrats lose. (Not hard numbers, just illustrating a point)
The Democrats losing are getting more votes, than when they won in 2018. Some by quite a bit more. If Trump had only pulled out his 2016 numbers, Democrats would be expanding their control instead of contracting. The polling turnout models all need an examination.
Along with some ticket-splitting, and the National environment being more like +5 or +6 than +7 or +8 like in 2018.
Was Georgia a surprise? I thought it was CSA territory
Suburban voters and a growing black population. With a smaller Hispanic population.
NC is whiter (but in prior elections more moderate) with a lower Black baseline and a fair amount of Hispanics.
While Florida is much more Hispanic.
Essentially Biden did have strength with Black voters and did have problems with Hispanics as predicted. Florida made the needle wrongly think it was a more uniform swing, instead of being a Florida + General Hispanic problem.
GA is on the leading edge of the demographic shift that has loomed over the GOP for a decade. Next is NC, then Texas. Virginia flipped last decade and is just gone to them now
The Demographic shift model isn't looking so hot right now, and a lot of its relies on Hispanics.
The Emerging Democratic Majority relied on
-Northern Whites being steady for Democrats (instead they have swung a bit to Trump and Republicans
-Hispanics growing to be a strength for Democrats (this is wrong, and they are depolarising)
-Black voters (steady for now for Biden, but not as rock-solid as they used to be).
Democrats have patched some of the holes with the turnout, better than expected youth margins and educated suburban voters. They are still clearly the majority American party. But not an emerging majority that can override all the system biases that favour the GOP.
Anyway, 538 is predicting that Biden will at some point overtake Trump and take both PA and GA. They don't call elections, but he seems the pretty safe bet.