Captain Obvious here...but it's become QUITE clear we have 4 groups of battlegrounds:
1. MN, MI, WI (Biden up 7+)
2. PA, NV, NE2 (Biden up 5-7)
3. FL, NC, AZ, ME2 (Biden up 2-3)
4. TX, OH, IA, GA (Either up <2)
They all neatly fit together and have for the most part recently.