Biden took the lead in Georgia earlier Friday morning. Trump's chances of securing reelection will hinge on developments in Georgia and Pennsylvania. 

Three days after polls closed, Biden has a 253 to 214 lead in the state-by-state Electoral College vote that determines the winner, according to Edison Research. Winning Pennsylvania’s 20 electoral votes would put the former vice president over the 270 he needs to secure the presidency.

Biden would also win the election if he prevails in two of the three other key states where he held narrow leads on Friday: Georgia, Arizona and Nevada. Like Pennsylvania, all three were still processing ballots on Friday, according to Reuters.