WASHINGTON (VINnews) – Sen. John Fetterman’s chief of staff resigned Wednesday, the latest departure from the Pennsylvania Democrat’s office as he has drawn criticism from the party’s left for his pro-Israel positions and more conciliatory approach toward President Donald Trump.

Cabelle St. John, who had served on Fetterman’s team since he arrived in Washington more than three years ago and became chief of staff in 2025, will leave in the coming weeks, a source familiar with the move told Axios. Her official last day has not been finalized.

Fetterman, once a progressive favorite, has faced significant staff turnover. Former aides have cited frustration with his steadfast support for Israel following the Oct. 7, 2023, Hamas attacks and his willingness to work with Trump on certain issues, diverging from many Democrats. Some ex-staffers also pointed to interpersonal challenges in the office.

Fetterman downplayed the turnover in a text to Axios after the report, sharing an image comparing his office’s retention to others and writing, “So much for the turnover issue. Clicks!”

The resignation comes as progressive groups prepare to challenge Fetterman in the 2028 Democratic primary. The Working Families Party and other left-leaning activists have already launched efforts, including a website, to recruit candidates against him, viewing his positions as a betrayal of the platform on which he was elected in 2022.

Pennsylvania’s Senate seat, currently held by a Democrat, could become a prime target for Republicans in a general election if Fetterman is weakened by a contentious primary or opts not to run.

Fetterman has maintained strong support for Israel and criticized what he calls “Trump Derangement Syndrome” within his party, further alienating some traditional Democrats.

No replacement for St. John has been announced. Fetterman’s office did not immediately respond to requests for comment.