https://twitter.com/politicsmaps/status/1606110079685574656
Depending on what you code as a GOP-leaning or not GOP-leaning state, our best guess is that the 2030 Census represents something like adding an extra Tennessee to the Electoral College. (At these numbers, Trump 2016 without any of MI/PA/WI is still a Republican victory, and for 2020 Trump needed to win any 2 of AZ/GA/WI -- not all three -- to flip the election). Assuming FL/NC/TX are solid -- all big assumptions to be sure -- Republicans after 2030 can win the Presidency with any two of AZ/GA/MI/PA/WI. (AZ/WI is uncertain: 2020, but the GOP flips those states, comes out at 269-269 on the above numbers, so if they're exaggerated that might still be a Democratic victory.)
There is a perception on the Democratic side that once they can reliably flip another Sunbelt state that the GOP will struggle to win nationally, but this to some extent puts the lie to that. Democrats need to keep flipping Sunbelt states to remain competitive nationally at all. And to be fair their recent record in AZ/GA has actually been very strong -- but it remains the case that even under high-turnout conditions they have pretty low floors in both states, particularly AZ.
So I do expect a big pro-GOP shift, and I actually posted an extreme scenario further up this thread. However, something occurs to me: if these maps assume
a linear extrapolation of 2020-22 trends that seems unreasonable unless there are additional pandemics of similar severity throughout the decade!
So, while I agree the South was likely undercounted in 2020, it's very possible that most of the movement between states that's going to happen this decade has already happened.
Also, are we sure the 2030 census won't continue to skew in the same way relative to the annual population estimates? Ironically, Republican activism in the 1990's made it unconstitutional to incorporate statistical sampling into the official census.
