While the vote for the Senate is extremely close, the Republicans have made some ground in the House of Representatives.
Projections show that the Republicans are likely to gain control of the House.
To take control, the Republicans need to gain an additional five seats. It will be challenging for President Joe Biden to pass laws over the remaining two years of his term if the Democrats lose the House.
In the past, Florida has been a close race, but the Republicans were able to hold onto their seats and flip three.
Ron De Santis was elected governor of Florida and is widely seen as a potential Republican presidential candidate in 2024. Senator Marco Rubio of Florida retained his seat. In turn, Democrats wrested control of the governorships from Republicans in both Massachusetts and Maryland.
Meanwhile, Democrats are trying to keep control of the Senate, Congress's higher chamber.
Prior to Tuesday's election, the Senate was split 50-50, but Democrats maintained control thanks to VP Kamala Harris' casting vote.
With only a few seats to go, Democrats have taken Pennsylvania, with John Fetterman defeating Trump-backed candidate Mehmet Oz. They have also retained control of New Hampshire, where the Republican candidate was polling strong.
Georgia, one of three remaining states that, together with Nevada and Arizona, could determine which party controls the Senate, has 97% of the ballots counted. Georgia will be decided in a run-off election on December 6 if neither party receives 50% of the vote.
According to the national exit poll, the two topics on voters' minds as they cast their ballots were rising prices and abortion. Almost one-third of those polled claimed inflation was the most important factor in determining how they voted. A vast majority of voters also stated that it had caused them difficulties in the previous year.
Abortion, however, was a close second, with 27% of respondents citing it as a determining factor after the Supreme Court reversed a decision that had protected abortion rights nationwide. Voters were, however, significantly divided along party lines; for Republicans, inflation was by far the most important topic, while for Democrats, abortion was the most important.
Midterm elections typically see a low turnout, but this year, over 116 million people cast ballots, according to preliminary data from the U.S. Elections Project.
This is one of the highest turnout rates in decades.