Democratic voters in Pennsylvania picked their nominees to flip four Republican-held seats seen as critical for the party to retake the U.S. House.

The wins in the Pennsylvania votes come as Democrats assemble their slate for a fall contest in which they’ll try to capture a U.S. House majority.

Those three swing districts are held by Republican U.S. Reps. Scott Perry, Brian Fitzpatrick and Ryan Mackenzie.

For Shapiro, the election year is an opportunity to show his political strength in a premier battleground state should he decide to run for president in 2028.

A self-described “proud troublemaker,” Chris Rabb is a member of Pennsylvania’s House of Representatives, where he made a name for himself by backing left-wing causes. He will almost certainly go to Washington next year to succeed retiring Democratic Rep. Dwight Evans since no Republican filed to run in the majority Black district.

Rabb was endorsed in the four-way primary by progressive stalwarts including U.S. Rep. Alexandria Ocasio-Cortez and online streamer Hasan Piker.

He fended off Sharif Street, a state senator and former state party chair who had prominent establishment backers and a familiar name as the son of John F. Street, the city’s former two-term mayor. Rabb also beat Dr. Ala Stanford, a pediatric surgeon who was backed by millions of dollars from 314 Action, a left-leaning political action committee aimed at electing scientists to Congress.