The eyes of the nation are ready to be fixed on the seven swing states that could decide the 2024 presidential election as the race reaches its final hours.

Vice President Kamala Harris and former President Donald Trump have barnstormed the states, making their final pitches to crucial voters that could put them in the White House.

Recent polling across Georgia, North Carolina,Pennsylvania, Michigan, Wisconsin, Nevada and Arizona shows tight races across the election’s battlegrounds.

One unexpected potential swing state revealed itself Saturday when an Des Moines Register/Mediacom Iowa Poll showed Harris ahead of Trump in Iowa by three points, though the result is within the survey’s margin of error. The state had been considered a safe state for Trump ahead of the poll.

Here’s what you need to know about the swing states as Election Day arrives.

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Swing state polls, past election results

Here are some recent polls taken in the battleground states, with the dates they were conducted, sample size and their margin of error as well as the last two election results in each state.

Arizona

Past election results:

2016 presidential election results: Trump beat Clinton 49% to 45.5%2020 presidential election results: Biden beat Trump 49.4% to 49.1%Georgia

Past election results:

2016 presidential election results: Trump beat Hillary Clinton 51% to 45.9%2020 presidential election results: Joe Biden beat Trump 49.5% to 49.3%Michigan

Past election results:

2016 presidential election results: Trump beat Clinton 47.6% to 47.4%2020 presidential election results: Biden beat Trump 50.6% to 47.8%Pennsylvania residents turn in their early ballots at the Bucks County Courthouse Monday, Nov. 4, 2024, in Doylestown.Nevada

Past election results:

2016 presidential election results: Clinton beat Trump 47.9% to 45.5%2020 presidential election results: Biden beat Trump 50.1% to 47.7%

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North Carolina

Past election results:

2016 presidential election results: Trump beat Clinton 50.5% to 46.8%2020 presidential election results: Trump beat Biden 50.1% to 48.7%Pennsylvania

Past election results:

2016 presidential election results: Trump beat Clinton 48.6% to 47.9%2020 presidential election results: Biden beat Trump 50% to 48.8%

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Wisconsin

Past election results:

2016 presidential election results: Trump beat Clinton 47.8% to 47%2020 presidential election results: Biden beat Trump 49.6% to 48.9%Voters cast their votes during early voting in the U.S. presidential election at a polling station in Detroit, Michigan, U.S. November 3, 2024. REUTERS/Rebecca CookThings to keep in mind about polling

The margin of error describes how accurately we can count on the survey results being representative of the entire population.

When a candidate’s lead is “inside” the margin of error, it is considered a “statistical tie,” according to Pew Research Center.

Pew has also found the majority of pollsters have changed their methods since the 2016 and 2020 presidential elections, where Trump’s performance was significantly underestimated.