The collective bargaining agreement between the city and the union representing the rank and file officers of the Chicago Police Department is one of the most expensive and politically fraught contracts a mayor can encounter. Typically a three year agreement, the contract between the city and the Fraternal Order of Police Lodge 7 (FOP), representing the rank and file officers of the Chicago Police Department, costs the city hundreds of millions of dollars a year in salaries to the city’s more than 11,000 police officers. And, since those officers are required to live in the city boundaries, they and their family members’ happiness with the contract has a direct impact on the mayoral election.