When will we know the results of the 2020 presidential election?

After days of waiting, the winner of the U.S. presidential election may become apparent on Friday.

Americans have been watching closely as mail-in votes continue to be counted in battleground states.

Former Vice President Joe Biden is holding the lead in four of the five remaining battleground states, but he has yet to clinch the 270 electoral votes needed to secure the presidency.

While the Associated Press and Fox News have both projected Biden as the winner in Arizona and awarded the state’s 11 electoral votes in their projected count, other media outlets like ABC have said Arizona is still too close to call. The AP said Friday morning they are monitoring the continued vote counting there and will update as the facts determine.

ABC has not yet projected Biden as the winner in Arizona, which is why their projections right now show Biden with 253 electoral votes compared to AP’s 264. Donald Trump stands at 214 electoral votes.

As of Friday morning, there’s no definitive winner in:

• Georgia - 16 electoral votes
• Pennsylvania - 20 electoral votes
• Arizona - 11 electoral votes
• Nevada - 6 electoral votes
• North Carolina - 15 electoral votes

Follow the results of the election here.

Counting mail-in votes has taken longer because they undergo a review process to determine that the ballot is valid. Many states also allow voters to fix potential errors with their mail-in ballot, which could lengthen the time it takes to tally the votes. News organizations have kept lags in mind before projecting the winner.

Legal battles have also ensued, which could draw out the election process even further.

Officials and Georgia and Pennsylvania said the results of the election could become more clear Thursday night. Arizona plans to release additional results tonight and Nevada will release another update Friday morning.

Depending on the results of those races, Biden may clinch the presidency Thursday night or the decision may drag on until Friday and possibly through the weekend.

Read more from KSAT’s Vote 2020 page:

• 4 big takeaways for Texas, Bexar County after 2020 election
• EXPLAINER: States still in play and what makes them that way
• Trump sues in 3 states, laying ground for contesting outcome