> I feel like if instead of deferring to the EPA, the Chevron case was deferring to police departments interpretations of the law when the law was ambiguous, we would be cheering this decision as a return to sanity.
In the original context of the 1984 Chevron case, environmentalists were arguing that the EPA had redefined "source" in an overly narrow way, much narrower than Congress had originally intended in passing the Clean Air Act, thereby enabling companies to emit more air pollution. The Chevron decision was seen at the time as a loss for environmentalists and win for the corporate sector and conservatives.
It's funny how the tables have turned – a decision which was originally praised by conservatives and condemned by liberals and environmentalists, eventually ends being condemned and overturned by conservatives, while being defended by liberals and environmentalists. Both the 1984 case and the 2024 case had a conservative majority, and were perceived at the time as furthering conservative political objectives.
I think what's really happened: in 1984, the federal judiciary was widely perceived as liberal-dominated, while the federal bureaucracy was seen as relatively more conservative, so liberals wanted the judiciary to be more powerful than the bureaucracy, conservatives wanted the opposite. In 2024, the situation is reversed: now the federal judiciary is perceived as being increasingly dominated by conservatives, while the federal bureaucracy is viewed as being more liberal, so now liberals want to defend the bureaucracy's power against judicial encroachment.
It looks to me like the only thing that's constant here – on both sides – is "the ends justify the means".