I’m guessing there will probably be around 220 Trump 2020 districts.
I don’t think it will be that pronounced. Dems probably squeeze one or more out of each of Maryland, Illinois, Oregon, Colorado, New Mexico and New York. California’s redistricting commission seems heavily biased in a Democrats’ favor too, so something like 47 or 48 Biden districts there wouldn’t surprise me either compared to the current 46. Geography really favors Democrats in California.
Conversely, I only think Republicans will try and squeeze one out of Georgia instead of two. Then the Indiana and Tennessee cracks. I don’t think they’re going to draw any Dems out in Texas, but all the new seats will be Republican. North Carolina might be R+2. Florida will be brutal at 20-8 would be my guess.
