Months of gruelling U.S. election campaigning are set to come to a head Tuesday night, as Americans vote in the final hours of a race that has been unprecedented in too many ways to count.
U.S. President Donald Trump is fighting to secure another four years in the White House, while Democratic challenger and former vice-president Joe Biden is pushing for a win to boot him out and with all eyes watching closely for results from key swing states like Georgia, Arizona and Pennsylvania.
LIVE RESULTS: Ongoing coverage as Americans vote for their next president
In order to win the presidency, one candidate must hit the magic number: 270.
That’s the number of seats it takes to secure the Electoral College.
Each state is allotted a set number of Electoral College votes and the swing states are the most fiercely contended battlegrounds, playing a decisive role in determining which candidate wins enough Electoral College votes to become president.
You can read a more detailed breakdown of how the Electoral College works here.
Traditionally, the main swing states are North Carolina, Florida, Pennsylvania, Michigan, Arizona, Wisconsin and Ohio. For the purposes of this piece and given the unprecedented nature of this campaign, we will also be keeping an eye on Texas, Minnesota, Georgia, Iowa and Nevada.
The question of control over the House of Representatives and the Senate are distinct races. For more information on how those are unfolding during the night to come, click here and here.
Here are the swing states to watch at a glance.
Arizona
Number of Electoral College votes up for grabs: 11
Who won last time: Trump
Who has won the state in 2020: Undetermined at this time.
Florida
Number of Electoral College votes up for grabs: 29
Who won last time: Trump
Who has won the state in 2020: Undetermined at this time.
Georgia
Number of Electoral College votes up for grabs: 16
Who won last time: Trump
Who has won the state in 2020: Undetermined at this time.
Iowa
Number of Electoral College votes up for grabs: 6
Who won last time: Trump
Who has won the state in 2020: Undetermined at this time.
Michigan
Number of Electoral College votes up for grabs: 16
Who won last time: Trump
Who has won the state in 2020: Undetermined at this time.
Minnesota
Number of Electoral College votes up for grabs: 10
Who won last time: 2016 Democratic candidate Hilary Clinton
Who has won the state in 2020: Undetermined at this time.
Nevada
Number of Electoral College votes up for grabs: 6
Who won last time: Clinton
Who has won the state in 2020: Undetermined at this time.
North Carolina
Number of Electoral College votes up for grabs: 15
Who won last time: Trump
Who has won the state in 2020: Undetermined at this time.
Ohio
Number of Electoral College votes up for grabs: 18
Who won last time: Trump
Who has won the state in 2020: Undetermined at this time.
Pennsylvania
Pennsylvania is a critical state to watch but its results are anticipated to be delayed because of the large number of mail-in and advance ballots to count, and tight electoral timelines to do it. Results for this state will also be updated in real time here.
Number of Electoral College votes up for grabs: 20
Who won last time: Trump
Who has won the state in 2020: Undetermined at this time.
Texas
Number of Electoral College votes up for grabs: 38
Who won last time: Trump
Who has won the state in 2020: Undetermined at this time.
Wisconsin
Number of Electoral College votes up for grabs: 10
Who won last time: Trump
Who has won the state in 2020: Undetermined at this time.