Sen. John Fetterman's chief of staff, Cabelle St. John, resigned Wednesday, according to a source familiar with the move. She has been with the Pennsylvania Democrat since he arrived in Washington about three-and-a-half years ago and became chief of staff in 2025. Her official departure is expected in the coming weeks.

The resignation underscores a persistent staff retention problem for Fetterman, who was once a progressive star. Former aides have grown frustrated with his steadfast support for Israel and warmer approach toward President Trump, with some also complaining about interpersonal working conditions.

St. John's exit adds to a pattern of high turnover in the senator's office. Fetterman, who has faced scrutiny over his health struggles and evolving political brand, did not initially respond to a request for comment.

After the story was published, Fetterman downplayed the turnover in a text to Axios. "So much for the turnover issue. Clicks!" he wrote, including an image showing other offices with purportedly higher turnover rates.

Fetterman's response suggests he views the coverage as overblown, but the cumulative departures signal ongoing internal challenges. The long-term impact on his legislative effectiveness and political standing remains uncertain.