A supporter of President-elect Joe Biden holds up his mobile phone to display the electoral college map outside the Philadelphia Convention Center after the 2020 presidential election is called on Nov. 7 in Philadelphia.

A supporter of President-elect Joe Biden holds up his mobile phone to display the electoral college map outside the Philadelphia Convention Center after the 2020 Presidential Election is called, Saturday, Nov. 7, 2020, in Philadelphia. (AP Photo/John Minchillo)