Instead, Mckesson says, Campaign Zero is focused on strategies that both “reduce the power” and “shrink the role” of existing police departments. One step is getting rid of police-union contracts, he says, which often protect bad cops and prevent police chiefs and mayors from making significant reforms. A 2018 study from the University of Chicago found that after Florida sheriffs’ offices were allowed to unionize, violent misconduct such as use-of-force incidents increased 40% (off a very low base, the researchers said). University of Chicago law professor Dhammika Dharmapala, who co-authored the study, said that the findings suggested “a large proportionate increase once an agency has the right to unionize.”

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