Pennsylvania Sen. John Fetterman, who had a stroke during his campaign last year, has been hospitalized after feeling lightheaded while attending a Democratic retreat, his office said.

Initial tests at George Washington University Hospital did not show evidence of a new stroke, Fetterman’s communications director, Joe Calvello, said in a statement Wednesday night. The senator remained at the hospital for observation as doctors conducted more tests, AP reports.

“He is in good spirits and talking with his staff and family. We will provide more information when we have it,” Calvello said.

In November, Fetterman, 53, won the seat held by now-retired Republican Pat Toomey after a hard-fought contest against GOP nominee Mehmet Oz. Fetterman, who was the lieutenant governor, defeated the celebrity heart surgeon by 5 percentage points, flipping a seat that was key to Democrats holding the Senate majority. More than $300 million was spent during the campaign, making it the most expensive Senate race in 2022.

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