Why we may not know the winner of the US presidential election on Nov. 5 | amNewYork
Briefly

As ballots are counted, one candidate may appear to be leading based on early returns, only for a rival to close the gap as more votes are tallied.
In 2020, some states experienced a red mirage, in which Trump appeared to be leading on election night, before a blue shift saw Democrat Joe Biden overtake him.
Democrats are outpacing Republicans in mail ballots once again this year, according to an early vote tracker maintained by the University of Florida's Election Lab.
Voting by mail is extremely popular in Arizona; nearly 90% of voters cast their ballots early, most by mail, in 2020.
Read at www.amny.com
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