I’m not sure that’s possible as Dems have bought into mail-in ballots in a big way. In Florida, for example, Dems lead Reps by around 700K on the returned mail ballot.
https://www.miamiherald.com/news/politics-government/state-politics/article246891077.html
They've been counted up to yesterday.
Interestingly 'So far, 66.2% of all registered Florida Democrats have voted, as well as 65.8% of registered Republicans and 51.5% of no-party-affiliated voters'.