PHILADELPHIA - The Philadelphia police union on Wednesday announced they have filed a lawsuit against the city's decision to hold a public hearing about the department's upcoming contract proposal.In a release, Fraternal Order of Police Lodge #5 President John McNesby called the city's ordinance "invalid" and claimed it “adversely affects [the union's] collective bargaining rights.”The ordinance, which was passed by Philadelphia City Council and signed by Mayor Jim Kenney, calls for a public hearing on the collective bargaining process and the Philadelphia Police Department's impending contract negotiations with the city.The union, which includes 6,500 members, says they oppose the ordinance because the collective bargaining process is.