At some point between the evening of November 3 and days or even weeks after, Donald Trump or Joe Biden will be declared president-elect of the United States.
This may come after an extended period of uncertainty, charges, counter-charges, lawsuits, demonstrations, and/or rioting. One or more states may be awarded to Trump or Biden by the Supreme Court, as was done in the election between George W Bush and Albert Gore in 2004. In fact, unless the election is a landslide, such a period of post-election uncertainty is very likely.