Democrat Kamala Harris faced Republican Donald Trump on Tuesday in the U.S. presidential election, with the two candidates vying to attract support after staking positions on issues including abortion,

there are also exit polls conducted in specific states with key, competitive presidential or down-ballot races. This year, those states include Arizona, Georgia, Florida, Michigan, Nevada, North Carolina, Ohio, Pennsylvania, Texas and Wisconsin.

With Election Day upon us and millions of Americans lining up to cast their ballot, some may also complete exit polls. Here's what they mean.