Sen. John Fetterman's approval rating among Democratic voters in Pennsylvania has cratered from 79% to 22% in less than three years, and the knives are out. Multiple Democratic officials and political observers are now openly discussing primary challengers for the 2028 Senate race, a remarkable turn for a senator who swept all 67 Pennsylvania counties in the 2022 Democratic primary.
The sin? Fetterman voted according to his conscience.
According to the Post-Gazette, he supported border security. He backed Israel after October 7. He voted to keep the government open when his own party wanted a shutdown fight over ICE operations. He confirmed a qualified homeland security secretary. For this, Pennsylvania's Democratic establishment wants him gone.
According to CQ-Roll Call's annual vote studies, Fetterman voted with a majority of his party against a majority of Republicans 80% of the time last year. That means on four out of five partisan votes, he was a reliable Democrat. But it's the other 20% that has made him radioactive to a base that demands total conformity.
Those dissenting votes weren't random acts of rebellion. They followed a clear pattern:
Read that list again. Border security, keeping the government funded, standing with an ally under attack, and confirming a cabinet nominee. These are not fringe positions. They are, by any historical measure, center-of-the-road governance. The fact that they now constitute grounds for excommunication from the Democratic Party tells you everything about where that party has gone.
The names being floated for a 2028 primary challenge include former Rep. Conor Lamb, state Rep. Malcolm Kenyatta of Philadelphia, former Rep. Susan Wild of the Lehigh Valley, Rep. Chris Deluzio of Fox Chapel, and Rep. Brendan Boyle of Philadelphia.
Their attacks on Fetterman have been public and personal. Wild called him "such a disappointment" on X and added:
"People worked so hard for Fetterman and he kicked them in the teeth."
Boyle responded to the Mullin confirmation vote with even less subtlety:
"Once again Sen Fetterman shows why he is Trump's favorite Democrat. He needs to go."
Note what Boyle didn't do. He didn't argue that Mullin was unqualified. He didn't explain why a homeland security secretary shouldn't be confirmed. He simply invoked Trump's name as a disqualifying association. That's not a policy argument. It's a purity test.
Deluzio, for his part, was slightly more measured in an interview with the Post-Gazette, citing "a big, profound disagreement" over Fetterman's support for military action regarding Iran and funding the government without ICE restrictions. But he stopped short of declaring a challenge:
"I'm running for re-election this year, 2026, which I do not take for granted, asking people to send me back to Washington."
He added: "We'll see what 2028 brings." Not exactly a denial.
Lamb has been using his X account to regularly attack Fetterman, and Kenyatta has done the same. Neither responded to requests for comment.
What's happening to Fetterman is instructive, not because he's become a conservative, but because it reveals the Democratic Party's intolerance for even modest deviation.
Fetterman endorsed Bernie Sanders for president in 2016. He has aligned with every other Senate Democrat in blocking Republican efforts to enact new voting restrictions. He is currently raising money for fellow Democrats ahead of the fall midterm elections. A recent fundraising email sent under his name warned that "Republicans are pouring millions of dollars into the midterm elections, propping up extreme, out-of-touch candidates who will be nothing more than rubber stamps on Trump's MAGA agenda."
This is not a man who has left his party. This is a man whose party has left the building.
Fetterman told Fox News Channel that he believes he is "on the right side of reasonable" and described himself as "the guy that's on the side of country over party." Christopher Borick, a political science professor at Muhlenberg College, framed the broader dynamic plainly:
"If you are breaking with your party, it's seen in a way that is more intense and negative than we would have seen in the past."
Borick added that Fetterman "is paying a price in terms of his standing within his own party." That price is measurable. The February 2026 Quinnipiac poll showing 22% approval among Democratic voters represents a 57-point collapse from the 79% he enjoyed in June 2023.
Berwood Yost, director of the Franklin & Marshall College Poll, offered what may be the sharpest analysis of Fetterman's predicament:
"It's an interesting test of the assumption or of the things that voters tell us, where they would like to see more compromise in our politics and less partisanship."
Voters say they want bipartisanship. They say they want elected officials who put country over party. Then, the moment a senator actually does it, his own base tries to destroy him. Yost identified the core tension: Fetterman's approach might position him well in a general election, but it could sink him in a primary where base voters dominate.
"I don't think there's any doubt that he's going to get primaried."
Fetterman entered 2026 with just $1.9 million in the bank. For comparison, former Sen. Bob Casey had $2.5 million at the equivalent point in his last re-election cycle. With two years until he faces voters again, the financial picture is manageable but not commanding, especially if a well-funded challenger emerges early.
Former Rep. Paul McHale, a Democrat from the Lehigh Valley who once bucked his own party to vote to impeach President Bill Clinton, offered a nuanced take on Fetterman's situation:
"My impression is that Sen. Fetterman is voting his conscience when he casts an independent vote, but that doesn't mean that he's voting wisely."
McHale then laid out the case for a challenge in terms that were almost lawyerly in their precision:
"So it is perfectly legitimate for another candidate to determine that the senator has voted in good faith, he has shown independence, but he may also have shown very bad judgment, and, as a result, is worthy of a challenge."
This is the most honest framing any Democrat has offered. Not that Fetterman is corrupt. Not that he's been bought. Simply that his judgment on keeping the government funded, securing the border, and supporting an allied nation under terrorist attack constitutes "very bad judgment."
That framing tells you exactly where the Democratic base has landed. Security is a bad judgment. Keeping the lights on is bad judgment. Standing with Israel is a bad judgment.
Borick suggested that Fetterman may be eyeing something beyond the traditional Democratic primary path entirely, perhaps "another place where he can break some new ground and transform Pennsylvania politics." He acknowledged this "takes a bit of confidence and maybe even hubris" but added that conventional routes through the existing party structure look "increasingly harder."
Fetterman has said he has no interest in switching parties. But the question isn't whether Fetterman leaves the Democratic Party. It's whether the Democratic Party has any room left for a senator who agrees with them 80% of the time but refuses to make it 100.
The answer, apparently, is no. And that says far more about the party than it does about the senator.