Four Democratic governors are projected to keep their seats: Illinois Gov. JB Pritzker, Maryland Gov. Wes Moore, Massachusetts Gov. Maura Healey and Pennsylvania Gov. Josh Shapiro.

Polls have now closed in these states as of 8 p.m. ET: Alabama, Connecticut, Delaware, Florida, Illinois, parts of Kansas, Maine, Maryland, Massachusetts, parts of Michigan, Mississippi, Missouri, New Hampshire, New Jersey, parts of North Dakota, Oklahoma, Pennsylvania, Rhode Island, parts of South Dakota, Tennessee and parts of Texas.

Polls have also closed in Washington, D.C.

As AI and data centers have emerged as a key theme in the 2026 midterms, preliminary Voter Polls across a range of states indicate the issue is a concern for many voters.

In New Hampshire, AI data centers are a crucial factor for around a quarter of voters, of whom about 8 in 10 believe that AI will do more to help than hurt society, according to preliminary ABC News Voter Poll findings.

In Ohio, about 6 in 10 of the Senate voters in the state say artificial intelligence will do more to hurt society than to help it, according to preliminary ABC News Voter Polls, while around a quarter say it will do more to help and 1 in 5 say neither

In Nebraska, where independent U.S. Senate candidate Dan Osborn has made data centers a key issue in his campaign, about 6 in 10 Nebraska Senate voters say artificial intelligence will do more to hurt society than to help it, according to preliminary ABC News Voter Polls. Around a quarter say it will do more to help and 1 in 5 say neither.

Overall, around 1 in 5 Nebraskan Senate voters say AI data centers were crucial in their vote for Congress, according to preliminary ABC News Voter Polls.

In North Carolina, where Raleigh and other cities are voting on data center moratoriums, about 6 in 10 of North Carolina Senate voters say AI does more to hurt society, while roughly one-quarter say it does more to help society, according to preliminary ABC News Voter Poll findings.

President Donald Trump told CBS News in a phone interview prior to polls closing on Tuesday that he was prepared to use “tremendous powers” that he said the Supreme Court granted him if Democrats take control of Congress and refused to make any predictions about how the night will develop.

"We won the Slaughter case and the Slaughter case gives the president tremendous powers that it never had before," Mr. Trump said referring to the Supreme Court case earlier this year that gave him the power to exert control over federal agencies.

Later, Trump indicated his veto power could enable him to strike deals with Democrats.

"Historically, you veto for a couple of months and then they come and say, 'We've got to make a deal,'" Trump said.

-ABC News' Nicholas Kerr