I was watching Virginia pretty closely since at first it looked like it would be a surprise flip to Trump. Nothing reported during the election but it looks similar to the swing state. Trump was leading by quite for most of the night then some big vote updates came in and it flipped to Biden.
Some shady stuff earlier this year: https://www.wusa9.com/article/news/verify/verify-wrong-mail-in-ballots-fairfax-virginia/65-94c4847c-63fb-4a93-bac5-9bb45df00a8d https://www.localdvm.com/news/virginia/mail-collection-boxes-tampered-with-at-6-usps-locations-across-central-virginia
Here is link dump with evidence for:
Dead / Ghost Voters
Voting Using Someone Else's Ballot / Pre-Filled-Out Ballots
Ballot Harvesting, Voting More Than Once
More Votes / Registration than Possible
Duplicate Ballots / Faulty Ballots / Incorrect Issuance
Destroyed / Discarded / Lost / Uncounted / Cancelled / Stolen Ballots
Poll watcher obstruction
Fraud Cases
Math/Stats such as Benford's law
I was surprised there was so little of an effect of the constant Antifa riots every night on the election results in Oregon. Maybe we now know why.