Since opening in 1971, Disney has updated The Hall of Presidents when a new President is elected.
Historically, the attraction has closed on or around election day or inauguration day for the update. Following the election of Barack Obama in 2008, the attraction re-opened in July of 2009. Following the election of Donald Trump in 2016, the attraction re-opened in December of 2017.
At this time, it is assumed that Disney will update the attraction with a new animatronic for Joe Biden. The attraction underwent a significant technical update in 2017 and it is unlikely that substantial additional changes will take place.
November 7, 2020: Multiple news outlets have declared Joe Biden the winner of the Presidential election.