Results of the presidential election may be delayed.

With mail-in ballots being a prominent way for voting in this election, some states have decided to count ballots past Election Day as long as they have been postmarked by Election Day. 

One of these states is Pennsylvania, a key swing state in this election that will continue counting mail-in ballots until Nov. 6. The state began counting votes after the polls closed at 8 p.m., causing a ballot-counting backlog and possibly delaying the announcement of the presidency. 

Other key states that are counting mail-in ballots after Election Day are Iowa, Nevada, North Carolina, Texas, Ohio and Michigan. Michigan has the latest date  of Nov. 17, although an unofficial report is expected by the weekend of Nov. 6. Having these key swing states extend the dates for counting mail-in/absentee ballots means the results of the presidential election may not be known as of the night of Nov. 3. 

The process of making sure every ballot is accurately counted usually goes into late November and in some cases into December. With the intensified political pressures from this election season, it may be ongoing as the outcome will likely be put off for days, or weeks. 

But how long will it take before the winner of the presidency is announced? The presidential electors meet on Dec. 14 to formally cast their votes. This date will most likely be the latest date for the official announcement of who is the president.