For those of you interested in wildly overreacting to a very narrow dataset on this Election Day, might I recommend Duval County, Florida?
https://www.duvalelections.com/Election-Information/2020-General-Election-Turnout
https://www.duvalelections.com/Election-Information/2020-General-Election-Turnout
Duval County has been won by the Republican candidate in each of the past 3 presidential elections, but each time by very narrow margins. In 2016, Republican and Democratic turnout was almost exactly even.
Dems entered Election Day in Duval County with a turnout lead of about 24,000 voters, built largely on their advantage among mail ballots. As of the last update (linked in the first tweet in this thread) that advantage has been cut to about 14,000 votes.
Now, keep in mind, it's almost certainly not enough for President Trump to replicate 2016's turnout of parity between Dems and GOPs in Duval, as he will almost certainly do worse with unaffiliated voters than he did in that election.