Adam Jentleson raised concerns about the senator's mental health after taking office in a piece for New York Magazine's Intelligencer.

Adam Jentleson, Fetterman's former chief of staff, detailed "warning signs" to the senator's doctor and expressed concern he "won’t be with us for much longer."

But one impending confirmation in particular, seemed to bother Fetterman immensely, New York Magazine reported, as he was torn on whether to vote for then-Defense Secretary nominee Pete Hegseth, who faced allegations of sexual assault and alcohol abuse.