Pennsylvania Sen. John Fetterman, D, was transported to the GW Hospital Wednesday after feeling “lightheaded,” according to a statement from the senator’s communications director.

Joe Calvello, Fetterman’s communications director, said in Wednesday’s release that the senator will stay at the hospital overnight for observation. Calvello said initial tests on Fetterman, who suffered a stroke last May, showed no signs of a new stroke.

Fetterman started feeling lightheaded during Wednesday’s Senate Democratic retreat at the Library of Congress and called his team, who then drove him to the hospital, according to the release.

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

Fetterman is still recovering from auditory processing challenges caused by his May stroke, and Senate officials installed a special screen on his chamber desk that shows captions for comments within the chamber.

Fetterman beat Republican celebrity doctor Mehmet Oz in November for the Pennsylvania seat, helping Democrats secure a majority in the upper chamber.

The GW Hospital also treated Maryland Sen. Chris Van Hollen, D, after the senator experienced a “minor” stroke last May.