Recent outbursts and stories surrounding Sen. John Fetterman of Pennsylvania have raised questions from those on Capitol Hill and in his inner circle about his mental health. A video of Fetterman on a flight back to Pittsburgh shows him arguing with a flight attendant over his seat buckle, which the attendant said needed to be visible.

Pennsylvania Sen. John Fetterman, the lawmaker known for his unconventional and irreverent brand of politics, is in the news again after a blowup at a closed-door meeting with union allies and former staff aides who aired concerns about his mental health.

The former chief of staff to Senator John Fetterman last year wrote to a doctor who had treated him, pointing to “warning signs” that suggested the senator could be backsliding on his recovery from a mental health crisis.