If you want to make group A look better than group B, all you need to do is correct for the factors which put group A at a disdvantage.
So, if you want to make blue state policies look good, you correct for population density and timing of first wave.
If you want to make red state policies look good, you correct for obesity rates and population age.
Actual researchers won’t be fooled. But it works if your goal is to have a nice headline in NYT or WSJ.
You said it better than I did.