When will we know presidential election results?

Election Day in the United States is now often considered Election Week, as each state follows its own rules and practices for counting ballots — not to mention the legal challenges — that can delay the results. But the truth is, nobody knows how long it will take for the winner to be announced this time.

In 2020, The Associated Press declared President Joe Biden the winner on Saturday afternoon — four days after polls closed. Even then, The AP called North Carolina for Donald Trump 10 days after Election Day and Georgia for Biden 16 days later after hand recounts.

Four years earlier, the 2016 election was decided just hours after most polls closed. The AP declared Trump the winner on election night at 2:29 a.m. (it was technically Wednesday morning on the East Coast).

This time, both campaigns believe the race is extremely close across the seven swing states that are expected to decide the election, barring a major surprise: Arizona, Georgia, Michigan, Nevada, North Carolina, Pennsylvania and Wisconsin.

The size of the map and the tightness of the race make it hard to predict when a winner could be declared.

Where can I find early signs?

Look to two East Coast battleground states, North Carolina and Georgia, where the results could come in relatively quickly. That doesn't mean we'll get the final results in those states quickly if the returns are close, but they are the first swing states that might offer a sense of what kind of night we're in for.

To go deeper, look to urban and suburban areas in the industrial North and Southeast, where Democrats have made gains since 2020.

In North Carolina, Kamala Harris’ margins in Wake and Mecklenburg Counties, home to the state capital of Raleigh and the state’s largest city, Charlotte, respectively, will reveal how much Trump will need to squeeze out of the less-populated rural areas he has dominated.

In Pennsylvania, Harris needs heavy turnout in deep blue Philadelphia, but she's also looking to boost the Democrats’ advantage in the arc of suburban counties to the north and west of the city. She has campaigned aggressively in Bucks, Chester, Delaware and Montgomery counties, where Biden improved on Clinton’s 2016 winning margins. The Philadelphia metro area, including the four collar counties, accounts for 43 percent of Pennsylvania’s vote.

Elsewhere in the Blue Wall, Trump needs to blunt Democratic growth in Michigan's key suburban counties outside of Detroit, especially Oakland County. He faces the same challenge in Wisconsin's Waukesha County outside of Milwaukee.