What are the swing states? Electoral maps from 2016, 2020 show where votes flipped

What was likely to be a rematch of the 2020 presidential election was upended Sunday when President Joe Biden dropped out of the 2024 race.

Biden quickly endorsed Vice President Kamala Harris as his successor, and her campaign got to work immediately, gathering support from the majority of the party to shift delegate pledges from Biden to Harris.

Assuming Harris does indeed secure the nomination, she has just more than 100 days to campaign for office.

But Republican nominee Donald Trump has maintained an edge over his Democratic rival in seven states that are crucial to secure the 270 electoral votes necessary to win.

Here are the states that could likely decide the election:

Harris vs. Trump: How do the candidates compare in recent swing state polls?

What are the swing states?

The following states flipped parties in the presidential election between 2016 and 2020:

• Arizona

• Wisconsin

• Michigan

• Pennsylvania

• Georgia

Nebraska distributes electoral votes proportionally, and it flipped one vote blue in 2020. Nevada and North Carolina are also considered battle ground states.

Map: Joe Biden beat Donald Trump in 2020

Biden won with 306 electoral votes.

Map: Donald Trump beat Hillary Clinton in 2016

Trump won with 306 electoral votes.

Contributing: Joey Garrison, Maya Marchel Hoff

This article originally appeared on USA TODAY: These 'swing' states could be critical in 2024 presidential election