Per Steve Kornacki and MSNBC: There are 250,000 outstanding ballots in Pennsylvania, with mail-in ballots going toward Biden at a 75% rate.
Biden currently trails Trump by just less than 64,000 votes in the state, but if this pace continues, Biden will end up with a lead of about 55,000 votes in the state.
If Biden takes 64% of the outstanding vote, he wins the state.