Sen. John Fetterman lost his third chief of staff since taking office after casting the lone Democratic vote against a Senate resolution aimed at curbing President Donald Trump's military operations in Iran. Cabelle St. John resigned on May 21, two days after the 50-47 vote, capping a stretch of staff departures that has turned Fetterman's office into one of the most turbulent on Capitol Hill.
The Pennsylvania Democrat's May 19 vote marked the eighth time he broke with his party to oppose efforts to restrict Trump's authority to strike Iran, USA Today reported. Every other Senate Democrat voted for the measure. Four Republicans, Bill Cassidy of Louisiana, Lisa Murkowski of Alaska, Susan Collins of Maine, and Rand Paul of Kentucky, crossed over to join them. Three more Republicans, Thom Tillis, John Cornyn, and Tommy Tuberville, did not vote.
The resolution would direct the president to "remove the United States Armed Forces from hostilities within or against Iran, unless explicitly authorized by a declaration of war or a specific authorization for use of military force." It now heads to the Republican-controlled House, though CBS News reported that Trump would likely veto the measure even if it cleared both chambers.
St. John's departure makes her the third chief of staff to leave Fetterman's Senate office since he joined the chamber in January 2023. She served in the role less than a year, the Philadelphia Inquirer reported. She had started as Fetterman's scheduler when he first arrived in the Senate and was described as the last original staffer still on his team.
The Inquirer attributed St. John's resignation to "longtime frustrations," some of them tied to Fetterman's relationship with David "Dovi" Safier, a fundraiser for Orthodox Jewish causes. New York Magazine had previously reported that Safier holds an "unusually large influence" over the senator.
Axios reported that Fetterman's office has experienced massive turnover driven by his support for Israel, his posture toward Trump, and interpersonal issues. Fetterman responded to the coverage with a dismissive comment to Axios:
"So much for the turnover issue. Clicks!"
The quip captures Fetterman's preferred mode when confronted with unflattering reporting, wave it off as media noise. But three chiefs of staff in roughly two and a half years is not a media invention. It is a management record, and it speaks for itself.
Fetterman has been the most visible Democratic hawk on Iran and Israel since the war in Gaza began in 2023. The Hill reported that he took a hardline stance compared to other Democrats in supporting Israel and its military action. That position has only sharpened over time.
In a May 7 Washington Post column, Fetterman laid out his reasoning in blunt terms. He wrote that the "leading state sponsor of terror should be held accountable" and that Iran-backed groups had escalated their attacks on a key American ally:
"In the wake of the war in Gaza, Iran-backed Hamas and Hezbollah have ramped up their attempts to dismantle our ally."
He added: "I remained committed to fully backing the elimination of these terrorists and their leaders." That language would not sound out of place coming from the other side of the aisle, and it is precisely the kind of rhetoric that has drawn sharp backlash from fellow Democrats.
The Trump administration, for its part, pushed back against Democratic claims that the president had exceeded the 60-day window allowing a commander in chief to engage in military hostilities abroad without congressional authorization. In a May 1 letter to lawmakers, Trump argued that hostilities against Iran had been "terminated" and that no formal declaration of war was necessary.
Just days before the May 19 vote, on May 13, Fetterman cast what USA Today described as the deciding vote against a similar resolution. His pattern is not a one-off protest. It is a sustained position, eight votes and counting, on one of the sharpest foreign-policy divides in the Democratic caucus.
The political math around Fetterman tells a story his party leaders would rather not read aloud. A February 2026 Quinnipiac University poll, reported by Punchbowl News, showed 46 percent of Pennsylvania voters approved of Fetterman's performance while 40 percent disapproved. That topline number masks a dramatic partisan split: among Republicans, Fetterman was up 74 to 18 percent. Among Democrats, he was underwater at 22 percent approval and 62 percent disapproval.
Read that again. A sitting Democratic senator is nearly four times more popular with the opposing party's voters than with his own base.
Fetterman acknowledged the oddity in a March appearance with Chris Cuomo on News Nation, as reported by The Hill:
"I, [in] some strange way, I am more popular with Republicans, which is, it's confusing because I vote, I vote in the 90s (percentage-wise) Dem line, and I didn't, and I haven't [voted] for the big ticket Trump ones like 'big, beautiful bill' or SAVE Act, and for those things."
He continued: "So, I mean, there's a lot of misinformation, I guess, but I am guilty of being a very proud supporter of Israel, and then I do support [Operation] Epic Fury."
Fetterman's claim that he votes with Democrats over 90 percent of the time may be technically accurate, but it misses the point. The votes that define a senator's brand are not the ones cast in lockstep with the caucus. They are the ones cast against it, and Fetterman has chosen to break on the issues that matter most to the progressive base: Israel, Iran, and Trump's executive authority.
Fetterman's voting record extends well beyond Iran. He voted in March 2026 to confirm Markwayne Mullin as Department of Homeland Security secretary. He voted with Republicans to end the government shutdown in fall 2025. He backed an annual DHS spending bill without added restrictions on federal immigration enforcement.
Those votes have fueled persistent speculation about whether Fetterman might switch parties. Pennsylvania GOP Chair Senator Greg Rothman said in April that he was watching to see if Fetterman would "jump ship," as reported by The Patriot-News. And the courtship has come from the top, Trump himself has publicly dangled endorsement and fundraising support to entice the senator across the aisle.
For now, Fetterman has ruled out a party switch while still delivering pointed rebukes to Democratic leadership. He frequently appears on Fox News. GovTrack's Ideology-Leadership Chart places several Democratic senators ideologically closer to the Republican Party, but none carry Fetterman's cultural profile, the hoodie-wearing populist from Braddock who won his seat by nearly 5 points over Dr. Mehmet Oz in 2022.
Fetterman's 2022 performance in the Pittsburgh area underscores what he stands to lose if his own party's voters turn on him for good. He won Allegheny County with 63.4 percent of the vote, 363,873 ballots, while Oz pulled just 34.9 percent. Those Pittsburgh-area votes accounted for more than 13.2 percent of his statewide total of 2,751,012.
He does not face re-election until 2028. That gives him time. But it also gives Democratic primary challengers time to organize. And a senator who is beloved by the other party's base while sitting at 22 percent approval among his own is not in a position of strength, he is in a position of novelty.
Fetterman's trajectory is part of a wider crack running through Democratic politics. His repeated breaks with every Senate Democrat on Iran war powers put him in a category of one. No other member of the caucus has been willing to stand alone on this question, not once, let alone eight times.
The staff exodus adds a human dimension to the political story. Chiefs of staff do not typically cycle through a Senate office at this rate. When they do, it signals something beyond policy disagreement. It suggests an office culture shaped by the same volatility that marks the senator's public positioning.
Fetterman's situation also echoes a broader trend in Pennsylvania, where a state Supreme Court justice recently left the Democratic Party, citing antisemitism, a departure Fetterman said he understood. The common thread is a party losing members who feel its institutional culture has drifted away from them on questions of Israel, security, and basic accountability.
Whether Fetterman's path leads to a formal break or simply to a long, lonely stretch as the Democratic caucus's most conspicuous dissenter remains an open question. What is not open to debate is the cost. Three chiefs of staff gone. A base that has turned against him. And a party that watches him vote with the other side on the fights that define the era.
When you keep losing the people closest to the work, the problem is not clicks. It is the job.
