Biden is going to have to get it done without PA. They are going to do whatever they can to trim the number of mail in ballots:
Pennsylvania election officials ordered to keep late mail ballots separate
WASHINGTON — Pennsylvania officials have notified the U.S. Supreme Court that the Secretary of the Commonwealth issued guidance to county boards of election directing them “to securely segregate all mail-in and civilian absentee ballots received between 8:00 p.m. on Tuesday, November 3, 2020, and 5:00 p.m. on Friday, November 6, 2020, from all other voted ballots.”
The cutoff under Pennsylvania law for receiving mail in ballots to count is 8 p.m. A state Supreme Court ruling extended that to 5 p.m. on Nov. 6 but that extension is under court challenge. Republicans are asking the Supreme Court to declare that order unconstitutional.
Republicans asked that, at a minimum, late ballots be kept separate. The state took the action today on its own.