Fairfax county is rescanning all early voting ballots. The claim is that there was an out of date or defective memory card in the machine used to scan those ballots. GOP lawyers signed off on the rescan being done.
Over 100,000 ballots to rescan, and Youngkin's lead is about 90,000 votes at this point with about 10% of the precincts remaining, plus those early voting ballots in Fairfax county that run heavily Democrat.
I'm going to say McAuliffe will be declared the winner by a very narrow margin by morning.
edit:
Youngkin's lead has narrowed to a smidge over 3%, with a 94,457 margin. Twelve percent of precincts remain to be counted, including I assume the early votes out of heavily Democrat Fairfax county.