Braddock Mayor Fetterman ran for U.S. Senate last year, while Bartos has never before held public office.
The May 15 polling will determine candidates for governor, lieutenant governor and various federal and state legislative positions.
Sources say Nina Ahmad's campaign is behind the legal move.
An official state investigation into bad behavior opened the floodgates.
"Philadelphia is one of the coolest cities in America. We should be proud of that. Everywhere I go, I try to project that.”