The election for the U.S. Senate in Ohio was a referendum on Hillary Clinton, who was elected to a third term in 2016.
The Democratic nominee won the state by 8 percentage points over her Republican challenger, Sen. Rob Portman, who has represented Ohio’s 8th Congressional District since 2008.
Democrats now control the chamber, 52-48.
The state’s Republican governor, John Kasich, is seeking a second term.
In his victory speech, Portman said, “Our lives have been changed for the better since I took office.
We will continue to put the needs of the people ahead of the self-interests of Washington and Wall Street.”
Clinton won the race by 20 points, according to exit polls.
She also won the most delegates at the national level, winning more than 724,000 votes to Portman’s 564,000.
Clinton has led Portman by more than 2.8 million votes.
She is now in a tight race with Republican Joe Manchin of West Virginia, who won his Senate seat in 2016 and faces an uphill battle to become a U.N. ambassador.
Manchin has also criticized Trump for being “unstable” during the campaign and said he was “not ready” for the job.
“You’ve got to put your best foot forward.
You’ve got a lot of work to do,” Manchin told reporters after the results were announced.