For the first time since the primary season, gubernatorial candidates Tom Corbett and Dan Onorato will appear on the same stage at approximately the same time Tuesday in what could be an audition, of sorts, in front of major campaign donors.

Dave Nachtweih, spokesman for the Students First PAC, said that financial heavy-hitters Joel Greenberg, Arthur Dantchik and Jeffrey Yass -- who together donated several million dollars to Democratic primary candidate Tony Williams -- will be among the audience for an education forum at the National Constitution Center.

The trio, partners in the Susquhanna Investment Group, of Bala Cynwyd, have indicated they have no plans at present to become major donors in the Corbett-Onorato race. A spokesman told media outlets they did not like the public scrutiny they received from their support of Williams. But at least they have a chance to hear the candidates on the issue they care about most -- a Williams bill in the state Senate to provide tax vouchers for private education to students stuck in low-performing schools.

The Students First PAC, based in Philadelphia, is led by Dawn Chavous, who was Williams' campaign manager.

The Tuesday event is not billed as a debate. Corbett, the GOP nominee, and Onorato, the Democratic candidate, will appear on stage one after the other, the spokesman said.