Top Democrats in Pennsylvania are maneuvering to run against Sen. John Fetterman in a 2028 primary contest, threatening to tear the party apart in the biggest battleground state in the nation.

Why it matters: Democrats haven't flipped a GOP Senate seat since Fetterman did it in 2022. He's still popular with Pennsylvania voters, even as Democrats turn on him over his softened approach to President Trump. • Potential Democratic challengers are already bashing Fetterman — and each other — years ahead of schedule. • Some Democratic officials are openly contemplating running against Fetterman or keeping the door open to a Senate bid in the event he retires.

The big picture: Democrats who could run against Fetterman include Reps. Brendan Boyle and Chris Deluzio and former Rep. Conor Lamb,

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