The Chicago Teachers Union and employees for Chicago’s school and park districts recently gave notice of their intent to strike. This means that the city may experience three different labor groups striking during the same month. If all three groups strike at the same time, it is unclear if this will help or hinder their cause. While it will certainly put pressure on city officials, it may result in a lack of public sympathy for the cause due to how disruptive a mass strike would be.
See "3 Chicago unions, including CPS teachers, could soon go on strike together in ‘an extraordinarily disruptive moment’", Hannah Leone, The Chicago Tribune, October 2, 2019