State Rep. Ed Gainey celebrates with wife Michelle, left, after winning the Democratic primary for Pittsburgh mayor, Tuesday, May 18, 2021, in Pittsburgh. (Steve Mellon/Pittsburgh Post-Gazette via AP)

A voter walks to a polling place in the Museum of the American Revolution in Philadelphia, Tuesday, May 18, 2021. (AP Photo/Matt Rourke)

Pittsburgh Mayor Bill Peduto speaks to supporters after conceding the Democratic mayoral primary to state Rep. Ed Gainey at his election party Tuesday, May 18, 2021, in Pittsburgh. (Andrew Rush/Pittsburgh Post-Gazette via AP)

A poll worker, right, hands a candidate information placard to an arriving voter for the primary election at St. Monica Parish, West Wyoming, Pa., on Tuesday, May 18, 2021. (Mark Moran/The Citizens' Voice via AP)

Former Luzerne County District Attorney Stefanie Salavantis, a candidate for Judge of the Luzerne County Court of Common Pleas, holds her daughter, Remington, as she votes in the primary election at the Municipality of Kingston Fire Department, Kingston, Pa., on Tuesday, May 18, 2021. (Mark Moran/The Citizens' Voice via AP)

Sonny Concepcion of Millcreek Township casts his vote in the municipal primary, Tuesday, May 18, 2021, at the Belle Valley Social Hall, in Millcreek Township, near Erie, Pa. (Jack Hanrahan/Erie Times-News via AP)

Pittsburgh Mayor Bill Peduto hugs his sister-in-law Donna Peduto after giving his concession speech at his election party Tuesday, May 18, 2021, in Pittsburgh. Peduto lost in the Democratic primary to state Rep. Ed Gainey. (Andrew Rush/Pittsburgh Post-Gazette via AP)

State Rep. Ed Gainey speaks to supporters after winning the Democratic primary for Pittsburgh mayor, Tuesday, May 18, 2021, in Pittsburgh. Gainey defeated incumbent Bill Peduto. (Steve Mellon/Post-Gazette via AP)/Pittsburgh Post-Gazette via AP)

An emotional state Rep. Ed Gaineym, center, is congratulated moments after learning he'd won the Democratic primary for Pittsburgh mayor, Tuesday, May 18, 2021. (Steve Mellon/Pittsburgh Post-Gazette via AP)

A voter steps from the voting booth after casting a ballot in the Pennsylvania primary in Philadelphia, Tuesday, May 18, 2021. (AP Photo/Matt Rourke)

Voters arrive to cast their ballots for the primary election at the Dupont VFW in Dupont, Pa., on Tuesday, May 18, 2021. (Mark Moran/The Citizens' Voice via AP)