That's true that the, er, "partisan mortality" difference is likely to be negligible. Bodies are bodies.

There absolutely does seem to be a difference between the partisan cohorts in preparation quality and infection likelihood though. Republicans have been told by their leaders and their media for weeks (Trump was still doing this as of yesterday) that this is no big deal, it's just like the flu, they don't need to do anything. Where democrats have been cancelling travel and buying toilet paper, republicans didn't even believe the crisis was real until the market crashed.

We'll see. But I bet before the smoke clears, we'll find there's good science showing a real partisan correlation with COVID-19 impact.