Francis Ryan, a professor at Rutgers University and a labor historian, has been researching Philadelphia unions for years. He said DC 33's deal was probably the best one it could get.

Francis Ryan, a professor at Rutgers University, believes District Council 33 got the best deal it could with.

Rutgers University professor and labor historian Francis Ryan says District Council 33's tentative agreement with the City of Philadelphia is probably the best the union could get.